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Frontier science issues

What is the ecological mechanism of cross-species transmission of coronaviruses?

　　At present, COVID-19 is raging around the world. Virologists have repeatedly warned that cross-species transmission of coronaviruses is a high probability event. The background situation of wild animals such as bats carrying coronaviruses and how wild animals break through ecological and physiological barriers to cause cross-species transmission and infection are still unclear at the scientific level. This question is of great significance for revealing the cross-species transmission mechanism of coronaviruses and preventing future epidemics caused by coronaviruses.

Question 2: How will the attractive force wave reveal the mysteries of the universe?

　　Since the first direct detection of attractive force waves in 2015, attractive force waves have rapidly become a hotspot in the frontier research of basic physics and astrophysics in the world, and it is expected that there will be a historical opportunity for major breakthroughs in the origin of the universe in more than ten years. Attractive force waves open a new window for observing the universe. By observing the generation and distribution of attractive force wave sources in the universe, it is expected to answer the deep scientific questions left over from the standard model of general relativity and particle physics, thereby deepening the understanding of nature.

Question 3: How does Earth’s material evolve and circulate?

　　The earth’s materials are mainly divided into rocks and minerals. People’s understanding of the evolution and circulation of magmatic rocks and metamorphic rocks in the earth’s historical period is blurred due to the lack of comprehensive analysis of big data. Using the comprehensive analysis of big data platforms and deep-time big data systems on the earth, it is possible to establish a connection between the basic course and special events of mineral evolution and planetary geological evolution, clarify the evolution law and coupling relationship of planetary earth and its multiple circles from the perspective of mineral evolution, and answer the basic scientific questions about how planetary earth evolves and whether there is a co-evolution relationship between various circles of the earth.

Question 4: What will a fifth-generation nuclear energy system look like?

　　In 2000, the Fourth Generation Nuclear Energy System International Forum initiated by the US Department of Energy divided the development of nuclear energy into four generations. At present, the research on the fifth generation nuclear energy system is still in the exploratory and exchange stage, and there is no mature concept definition and goal definition, and there is little talk about its realization path. If it can promote the implementation and final realization of the concept of the fifth generation nuclear energy system, it can reform the concept of nuclear energy development, the model of nuclear energy development, the concept of nuclear energy application, and support the deep decarbonization of the energy system; lead the world in nuclear energy innovation, and help China become the world’s nuclear energy innovation highland.

What is the scientific principle of special energy field-assisted manufacturing?

　　With the continued demand for lightweight and safety in aerospace, transportation, and other fields, high-strength materials, including ultra-high-strength steels, light alloys, composites, and intermetallic compounds, are applied to complex components. As material strength increases, manufacturing difficulty increases significantly, and forming defects are more difficult to control. Existing research shows that special energy field-assisted forming technology has great potential in improving the manufacturing challenges of high-strength and difficult-to-deform materials.

Question 6: How can digital transportation infrastructure promote the coordinated development of autonomous driving and vehicles?

　　In the future, the large-scale social operation of autonomous vehicles will inevitably appear, which will be a change for the transportation system, and the road transportation system is facing the challenge of evolution and replacement. For the research on new road infrastructure to support the social operation of autonomous driving, our country is still in its infancy, and there is no ready-made advanced technology and experience abroad to learn from. It is necessary to transfer the support of autonomous driving research to the research of intelligent supply on the infrastructure side and the research of comprehensive integrated landing application in a timely manner.

Question 7: What is the mechanism of traditional Chinese medicine that regulates human immune function?

　　Although the basic research of immunology has made remarkable achievements and medicine is also developing by leaps and bounds, it is still insufficient in the prevention and treatment of many difficult and serious diseases. Autoimmune diseases such as systemic lupus erythematosus, rheumatoid arthritis, and ankylosing spondylitis still plague patients. The occurrence, development, and outcome of these major and difficult diseases are closely related to immunity. Traditional Chinese medicine can act on the body at multiple levels, targets, and pathways, regulate the body’s immune function, and has important application value in disease prevention and treatment.

Question 8: What is the biological basis of plant apomixis?

　　Non-fusion reproduction is a kind of reproductive method that propagates asexually through seeds, which can make hybrid varieties produce cloned seeds, keep the characters of hybrid offspring from separating, and thus permanently fix ** advantages. However, due to the complexity of the mechanism of non-fusion reproduction, despite the efforts of scientists from many countries for nearly a century, its formation mechanism is still unclear, and it has not been successfully applied to crop breeding.

Question 9: How to optimize the water carrying capacity of our country in a changing environment and achieve a healthy regional water balance?

　　At present, the construction of ecological civilization in our country has entered an accelerated period and a critical period, which puts forward higher requirements for the intensive utilization and strict protection of water resources. Studying the scientific issue of water resources carrying capacity and water balance optimization under changing conditions is conducive to deepening the understanding of the factors of regional water cycle in our country and their evolution laws, improving the evaluation method of water resources carrying capacity, clarifying the index significance of water balance status for water resources carrying capacity, clarifying the occurrence mechanism of many water problems and ecological environment problems, and providing important theoretical and technical support for summarizing the economic and social development and ecological protection models that are compatible with water resources carrying capacity, and effectively protecting and restoring the ecological environment.

Question 10: How to establish a theoretical and technical foundation for virtual twins and develop demonstration applications?

　　Virtual twin is a process and method for describing and modeling the characteristics, behavior, formation process and performance of physical entities and intelligent entity objects in the real world using digital technologies such as sensors, Internet of Things, virtual reality, artificial intelligence, etc. on the basis of digital twin, also known as virtual twin technology. It is based on digital twin, but focuses more on modeling and simulation of intelligent entities or living beings. How to realize the interaction and integration of manufacturing the physical world and the information world is one of the core bottlenecks currently faced by the practice of intelligent manufacturing concepts and goals at home and abroad.

Engineering problems

Question 1: How to develop new pathways and technologies for novel immune cells in tumor treatment?

　　Immune cell technology is the hope for human to completely cure tumors, and it is one of the hot areas pursued by cutting-edge medicine and capital around the world. As a key node cell linking cellular immunity and humoral immunity, dendritic cells (DC) can mobilize the entire immune system, resist the invasion of pathogens and promote the clearance of tumor cells, becoming a key research direction of new immune cell therapies. The new DC amplification technology can realize the standardization and mass production of DC vaccines, which can significantly reduce the preparation cost and serve more cancer patients, with obvious economic and social benefits.

Question 2: Why has the integrated design of horizontal take-off and landing combined power vehicles become the new focus of aerospace technology?

　　水平起降组合动力运载器具有快速、廉价、可靠的特点，可成为低成本天地往返运输工具。水平起降组合动力运载器一体化设计技术是支撑未来航天运输系统发展与应用的核心技术之一，是未来先进航天运输系统的重要支撑技术之一。

●问题3：如何实现农业重大入侵生物的前瞻性风险预警和即时控制？

　　农业有害生物入侵不仅仅是简单的植物病虫害或动物疫情问题，入侵生物的发生流行不仅危害食品安全和农业生产，造成巨大的直接经济损失，还可能对人类健康构成越来越大甚至是灾难性的威胁，对外交、经济和社会产生巨大影响。因此，站在国际化、全球化视角，从科学研究和专业技术层面，开展农业入侵生物跨境传播预警及防减技术合作的协同攻关，将有力解决入侵生物疫情的源头治理和联防联控关键技术难题，保障社会稳定与公共安全。

●问题4：信息化条件下国家关键基础设施如何防范重大电磁威胁？

　　强电磁脉冲一旦对金融、能源、电力等领域的关键信息基础设施产生影响，将可能导致交通中断、金融紊乱、电力瘫痪等重大事故。开展此项研究，对确保关键基础设施电磁安全、保护经济建设成果、提升关键基础设施容灾抗毁能力具有重要意义。

●问题5：硅光技术能否促成光电子和微电子的融合？

　　信息光电子芯片已然成为“数字化新基建”的核心和基石，也是全球信息通信价值链的关键领域和网络强国建设的“国之重器”。硅基光电子芯片技术既可应用于芯片级光互连，又适用于长距离光纤通信，可实现全功能光电子集成，具有极高的通用性和兼容性，是微电子和光电子两大产业公认的发展方向。利用国内现有微电子产业资源和互补金属氧化物半导体（CMOS）制造平台，建立健全硅光产业链，可以有效提升我国信息光电子的制造能力，缓解光电子芯片制造工艺的“卡脖子”困境，为我国信息化新基建提供有力支撑。

Question 6: How to solve the problem of on-line defect detection in integrated circuit manufacturing process?

　　The field of integrated circuits is currently the main battlefield of international science and technology competition and the focus of the game between major powers. For integrated circuit defect detection technology and equipment, on the one hand, the most advanced technology and equipment are monopolized by a few developed countries; on the other hand, the defect online detection technology of 7 nanometers and below nodes around the world is still immature, and the equipment gap is still huge. Whoever takes the lead in mastering the corresponding key technologies will have the dominance in the future. This is both an opportunity and a challenge for our country.

Question 7: How can unmanned vehicles achieve high-precision intelligent navigation under conditions where satellites are not available?

　　Special unmanned vehicles represented by unmanned rescue vehicles, unmanned mining vehicles, and unmanned transport vehicles are the core unmanned equipment for completing modern operations, emergency rescue and disaster relief. In order to improve the emergency rescue and joint operation capabilities of unmanned vehicles, its navigation system is required to have functions such as high-precision positioning, autonomous obstacle avoidance, intelligent path planning and guidance. Therefore, it is necessary to study high-precision and fully autonomous navigation methods and to solve the problem of inertia-based intelligent navigation for unmanned vehicles.

● Question 8: How to achieve the unity of "large-scale", "low energy consumption" and "high stability" in the large-scale production of hydrogen by electrolysis of water from renewable energy sources?

　　The development of high-efficiency and low-cost renewable energy and hydrogen energy technologies is a timely response to the country’s major needs, and it is also a high-quality solution for reducing carbon emissions and mitigating climate change globally. However, the current level of development of hydrogen electrolysis technology limits the conversion efficiency and industrialization process of renewable energy into chemical energy. Breakthrough in high-efficiency, low-cost, and large-scale hydrogen electrolysis technology can greatly promote the utilization and development of renewable energy and hydrogen energy.

Question 9: How to break through the intelligent construction and engineering health protection technology of the expressway into Tibet?

　　The lithology of the Qinghai-Tibet Plateau is complex and changeable, the neotectonic movement is intense, the deep and large active faults are widely distributed, the glaciers, permafrost and mountain disaster groups (chains) are developed, and there are "significant terrain height difference", "strong plate activity", "frequent mountain disasters", "sensitive permafrost environment" four geological environmental characteristics, as well as "high frequency freeze-thaw cycle", "severe wet and dry alternation" and "extreme cold and hypoxia" three climatic and environmental characteristics. The series of engineering and technical problems brought about by this are the key technical factors restricting the development of high-speed transportation in Tibet.

　　CCTV News:On May 30, the highly concerned HPV nine-valent vaccine (nine-valent cervical cancer vaccine) began to be injected in Boao, Hainan. On the first day of injection, about 1,000 people completed the vaccine appointment.

　　HPV vaccination should be treated rationally

　　A month ago (April 29th), National Medical Products Administration approved the marketing of nine-valent cervical cancer vaccine in the Mainland. Boao Lecheng International Medical Tourism Pioneer Zone enjoys nine supporting policies, such as drug import registration and approval, and it takes only one month to take the lead in completing all the approval of nine-valent cervical cancer vaccine for marketing injection, and injecting it for school-age women in need. According to the regulations,The vaccine in the Mainland is suitable for women aged 16 to 26.

　　It is understood that HPV nine-valent vaccine is the most comprehensive vaccine against HPV virus in the world, and it can prevent 90% of cervical cancer against nine subtypes. It can be injected in Hong Kong earlier, and a shot costs about HK$ 2,250.

　　Experts from National Medical Products Administration, Health and Health Commission and China CDC have recently answered questions related to vaccines.Experts said that HPV vaccination should be treated rationally.(For details, see: the vaccine that can prevent more than 90% of cervical cancer can be listed in China conditionally.)

　　Nine-valent HPV vaccine "conditionally approved for marketing"

　　Experts pointed out that at present, the nine-valent HPV vaccine that has been approved for import registration by priority review is conditionally approved for marketing. Shao Jie, reviewer of the Clinical Department of Biological Products of the National Drug Administration Center, said that conditional approval paid attention to the ethnic differences of clinical trial subjects.

　　Data from overseas clinical trials show that,There are more than 2,000 Asian people in the clinical trial of the nine-valent HPV vaccine.China, Hongkong, China, Taiwan Province, Japan, Korea, etc. The population of China, Hongkong and Taiwan Province, China, which were included in the clinical trial, were analyzed separately, and the results were consistent with those of the global population. This is the basis for the inclusion of imported nine-valent HPV vaccine in conditional approval.

　　Experts said that the overall principle of conditional approval is that the benefits outweigh the risks. After the enterprise is conditionally approved, it needs to improve the follow-up research work as required, and the regulatory agency will continue to follow up and supervise the vaccine throughout its life cycle.

　　The age range of vaccination adaptation is 16 ~26 years old.

　　The nine-valent HPV vaccine approved for marketing in ChinaThe age range of vaccination adaptation is 16 ~26 years old.. The reason why it is designated as this age group comes from three aspects:

　　1. At this age, the overseas clinical research data of the vaccine and its protective effect against persistent infection in East Asian population all suggest that the benefits outweigh the risks.

　　Second, the probability of sexual behavior among girls aged 9-15 in China is very low. However, the 9-to 15-year-old vaccinators only carried out the immune bridging test, and the clinical research data of the East Asian Chinese population in this test were limited.

　　Third, women over the age of 26 may have a history of virus exposure and infection. At present, there is no evidence to prove that this vaccine has a protective effect on the exposed population of this age group.

　　In addition, experts said that,The incidence of adverse reactions of nine-valent HPV vaccine will be higher than that of four-valent vaccine.

　　Wang Huaqing, chief expert of immunization program of China CDC, pointed out that vaccination is primary prevention and screening is secondary prevention, which are equally important at present.Cervical cancer screening measures should not be relaxed because of vaccination.

　　What are the differences between bivalent, tetravalent and ninth-order vaccines used to prevent cervical cancer? A picture makes it clear ↓

Since September, Nanjing Children’s Hospital has received nearly 400 cases of influenza, which ushered in a small peak of influenza treatment.

Recently, the National Health and Wellness Commission held a press conference, suggesting that with the cold weather, it is the epidemic season of respiratory infectious diseases. Wang Huaqing, chief expert of immunization program of China CDC, suggested that influenza vaccine should be vaccinated before the end of October.

He mentioned that vaccination is usually better before the flu epidemic season, and it is generally recommended to complete vaccination before the end of October. If the vaccination is not available before October for various reasons, the vaccination should be completed as soon as possible in the follow-up so that the effect of the vaccine can be better played. Because it takes about 2 to 4 weeks for the vaccine to have an effect.

How to choose the flu vaccine? Who should be vaccinated the most? Who doesn’t recommend vaccination? About 13 questions about influenza vaccine, Jiangsu CDC authorities answered questions-

Q1. Why should I get the flu vaccine?

Influenza is not a common cold, but an acute respiratory infection caused by influenza virus. According to the estimation of the World Health Organization, influenza can cause 3 million to 5 million severe cases and 290,000 to 650,000 respiratory diseases-related deaths worldwide every year. Vaccination against influenza is an effective means to prevent influenza and reduce influenza-related severe illness and death.

Q2. What are the types of influenza vaccines? How should I choose?

There are inactivated vaccines (including split vaccines and subunit vaccines), attenuated live vaccines and recombination vaccines. According to the components contained in the vaccine, it can be divided into trivalent and tetravalent influenza vaccines. Compared with trivalent influenza vaccine, tetravalent influenza vaccine strains have added a pedigree of influenza B. Inactivated vaccine was injected intramuscularly, and attenuated live vaccine was sprayed intranasally.

The influenza vaccines approved for marketing in China this year include trivalent inactivated vaccine, tetravalent inactivated vaccine and trivalent attenuated live vaccine. People aged ≥6 months can be vaccinated with trivalent or tetravalent inactivated vaccine, and people aged 3~17 can also choose trivalent attenuated live vaccine. For people who can be vaccinated with different types of vaccine products from different manufacturers, they can voluntarily vaccinate any kind of influenza vaccine, and there is no priority recommendation.

Q3. When should I get the flu vaccine?

Usually, the antibody can reach the protective level after 2~4 weeks of influenza vaccination. The time and duration of the annual peak of influenza activity are different in different parts of China. It is suggested that the recipients should be vaccinated with influenza vaccine one month before the influenza epidemic season. If the vaccination is not completed before the arrival of the epidemic season, it can be vaccinated throughout the epidemic season.

Q4. Where can I get the flu vaccine?

Influenza vaccines can usually be vaccinated in community health service centers or hospitals. Vaccination units may vary from place to place, so please consult the local health administrative department for details.

Q5. Who needs influenza vaccination?

People who are over 6 months old and have no vaccination contraindications should be vaccinated against influenza.

Combined with the epidemic situation of influenza and the prevention and control strategy of multi-disease prevention, the harm of influenza is reduced as much as possible, and the following key and high-risk groups are recommended to be vaccinated in time:

① Medical personnel, including clinical rescue personnel, public health personnel, health and quarantine personnel, etc.

② Older people over 60 years old;

③ people suffering from one or more chronic diseases;

(4) Vulnerable people and employees in gathering places such as old-age care institutions, long-term care institutions and welfare homes;

⑤ Children aged 6 ~ 59 months;

⑥ Family members and caregivers of infants under 6 months old;

⑦ Crowds in key places such as kindergartens, primary and secondary schools and supervision places.

Q6. Who can’t be vaccinated?

① Those who are allergic to any ingredients contained in the vaccine (including auxiliary materials, formaldehyde, cracking agents and antibiotics) or who have had a history of severe allergy to any kind of influenza vaccination are prohibited from vaccination;

② Patients suffering from acute diseases, severe chronic diseases or acute attacks of chronic diseases, as well as patients with fever, are advised to be vaccinated after recovery or stable control of their condition;

③ Patients with Guillain-Barre syndrome within 6 weeks after previous influenza vaccination are advised to be evaluated by doctors before considering whether to vaccinate.

It should be noted that the following populations are prohibited from receiving live attenuated vaccines:

① Persons with low immune function due to drug use, HIV infection and other reasons;

② Children and adolescents who have been treated with drugs containing aspirin or salicylic acid for a long time;

③ Children with asthma aged 2-4 years;

4 pregnant women;

⑤ Those with a history of Guillain-Barre syndrome;

⑥ Those who used antiviral drugs such as oseltamivir and zanamivir 48 hours before inoculation, or those who used palamivir 5 days before inoculation, or those who used balosevir 17 days before inoculation.

Q7. What should I pay attention to after influenza vaccination?

After vaccination, you need to stay in the vaccination unit for half an hour. If there is no abnormality, you can leave on your own. After returning home, pay attention to rest, eat lightly and avoid strenuous exercise. If there is any abnormal phenomenon, you can consult and report to the vaccination doctor and go to the hospital if necessary.

Q8. Why do you have to get the flu vaccine every year?

First of all, influenza virus is prone to mutation. The World Health Organization proposes the recommended components of influenza vaccine for the next epidemic season every year based on the results of global influenza surveillance, and the influenza virus strains targeted by influenza vaccines may be different in different years. Secondly, the immunity of influenza vaccination will gradually weaken over time. Therefore, in order to provide more effective protection, it is recommended to vaccinate against influenza every year.

Q9. Is it safe to get the flu vaccine? Are there any side effects?

Influenza vaccination is safe, but like other medical products, influenza vaccine may also have adverse reactions. The common adverse reactions of influenza vaccination include local reactions (redness, swelling, induration, pain, burning sensation, etc.) and systemic reactions (fever, headache, dizziness, lethargy, fatigue, myalgia, general malaise, nausea, vomiting, abdominal pain, diarrhea, etc.). These adverse reactions are usually mild, and usually disappear on their own within a few days, with few serious reactions.

Q10. Can people with egg allergy be vaccinated against influenza?

Egg allergy is not a taboo in People’s Republic of China (PRC) Pharmacopoeia (2015 and 2020 editions). The current pharmacopoeia stipulates that the content of ovalbumin in inactivated influenza virus vaccine should not be higher than 250ng/ dose, and the content of ovalbumin in split vaccine should not be higher than 200ng/ml. There is no description of attenuated live vaccine at present. The measurement of egg protein content in commonly used influenza vaccines in China shows that the highest content is not more than 140ng/ml. At the same time, foreign scholars’ research on the inactivated vaccine or attenuated live vaccine inoculated to those who are allergic to eggs shows that no serious allergic reaction has occurred. Therefore, egg allergy is not recommended as a taboo for influenza vaccination.

Q11. Won’t you get the flu after vaccination?

In most years, influenza vaccine has a good match with influenza epidemic strains and has good protection. However, there is also a certain probability that the strain of influenza vaccine does not match the epidemic strain, which further affects the protection effect of influenza vaccine. In addition, influenza vaccination can only prevent influenza caused by influenza virus, but can not prevent such symptoms caused by infection of pathogens other than influenza virus (such as parainfluenza virus, adenovirus, etc.).

Q12. Can I get the flu vaccine while using antiviral drugs?

Inactivated influenza vaccine can also be inoculated during the prevention and treatment of influenza antiviral drugs. Preventive or therapeutic use of anti-influenza drugs will affect the immune effect of attenuated live influenza vaccine, and it is not recommended to use both at the same time. If you have used any other vaccines or drugs, including over-the-counter drugs, please inform the vaccination doctor before vaccination.

Q13. Can the flu vaccine be vaccinated at the same time as other vaccines?

Inactivated influenza vaccine, other inactivated vaccines and attenuated live vaccines, such as enterovirus 71 vaccine, pneumococcal vaccine, herpes zoster vaccine, chickenpox vaccine, measles vaccine and DTP vaccine, can be inoculated in different parts at the same time.

There is limited research evidence that live attenuated influenza vaccine and other vaccines are vaccinated at the same time. After vaccination with live attenuated influenza vaccine, other live attenuated vaccines can only be vaccinated after an interval of more than 4 weeks. (Wang Tian)

Source: Xinhua Daily Intersection Point

[Keywords:] national emergency management system; Major risks; National governance capacity

[Chinese Library Classification Number ]D63 [Document Identification Code ]A

　　Preventing and resolving major risks is an important part of the three major battles, and it is the political responsibility of party committees and governments at all levels and leading cadres. The COVID-19 epidemic is a sudden major risk, a big test of China’s national governance system and governance capacity, and a test of the ability of party committees and governments at all levels and leading cadres to prevent and resolve major risks. The General Secretary of the Supreme Leader pointed out that it is necessary to improve the national emergency management system and improve the ability to deal with urgent and dangerous tasks in view of the shortcomings and shortcomings exposed in the response to this epidemic. Party committees and governments at all levels and leading cadres must deeply understand the severe and complicated risk situation in China, give full play to the remarkable advantages of the Communist Party of China (CPC)’s leadership and Socialism with Chinese characteristics’s system, further improve the national emergency management system, and do a good job in preventing and resolving major risks.

　　First, a deep understanding of China’s severe and complex risk situation

　　The report of the 19th National Congress of the Communist Party of China pointed out that it is an important principle for our party to manage the country by coordinating development and security, enhancing the sense of hardship and being prepared for danger in times of peace. Only by strengthening risk awareness, constantly observing the general trend and thinking about the overall situation, scientifically predicting the development trend of the situation and hiding the risk challenges, and taking precautions can we enhance the initiative to prevent and resolve major risks.

　　To prevent and resolve major risks, we must first correctly grasp the situation and scientifically understand risks. Great changes have taken place in China’s current domestic and international environment, and the risk situation it faces has also changed greatly, showing three characteristics: various risks are complex and diverse, chain linkage and extreme risks are more prominent.

　　(A) various risks are complex and diverse

　　Socialism with Chinese characteristics has entered a new era, and today’s opening-up and development environment is generally more favorable than ever, and at the same time, it faces unprecedented contradictions and risks. In October 2015, General Secretary of the Supreme Leader pointed out: "In the next five years, it may be a period when risks in all aspects of China’s development are constantly accumulating and even concentrated. The major risks we face include domestic economic, political, ideological and social risks and risks from nature, as well as international economic, political and military risks. If there is a major risk and you can’t help it, national security may face a major threat, and the process of building a well-off society in an all-round way may be forced to be interrupted. " [1] The report of the 19th National Congress of the Communist Party of China also emphasized: "We should guard against all kinds of risks more consciously and resolutely overcome all difficulties and challenges in political, economic, cultural, social and other fields and in nature."

　　Risk is an important feature of modern society. At present, China is faced with the dual pressures of safeguarding national sovereignty, security and development interests externally and maintaining political security and social stability internally, and various foreseeable and unpredictable risk factors have obviously increased. The risks we face are varied, including natural risks, economic risks and technological risks, as well as health risks, social risks and political risks, including both local risks that occur in China and imported risks that are affected by other countries (regions).

　　(B) Risk linkage

　　Today’s society is an open giant system, and various risks often do not appear in isolation. It is likely that you have me and I have you, which are intertwined and form a risk complex. General Secretary of the Supreme Leader pointed out: "Various sources and points of contradictory risk challenges are intertwined and interact with each other. If we fail to take precautions and respond effectively, it will be transmitted, superimposed, evolved and upgraded, so that small contradiction risk challenges will develop into large contradiction risk challenges, local contradiction risk challenges will develop into systematic contradiction risk challenges, international contradiction risk challenges will evolve into domestic contradiction risk challenges, and contradictions in economic, social, cultural and ecological fields will turn into political contradiction risk challenges, which will ultimately endanger the party’s ruling position and national security. " [2]

　　With China’s reform entering the deep-water area, economic development has entered a new normal, various contradictions are superimposed, and potential risks are concentrated, which is easy to form systematic risks and produce "ripple effect" and "domino effect". Therefore, we should strictly prevent all kinds of security risks from gathering and converging to form a risk complex, and keep the bottom line that systematic risks do not occur. At the same time, in the era of economic globalization, the security of all countries is interrelated and affects each other; No country can seek its own absolute security on its own, and no country can reap stability from the turmoil of other countries. Therefore, we should co-ordinate the two major domestic and international situations and develop two major safety issues, focusing on the key points and taking the overall situation into consideration, so as to effectively prevent all kinds of risk chain linkage.

　　(3) Extreme risks are more prominent.

　　General Secretary of the Supreme Leader stressed, "In the face of the complicated international situation, complex and sensitive surrounding environment, and arduous and arduous tasks of reform, development and stability, we must always be on high alert, not only for the’ black swan’ incident, but also for the’ grey rhinoceros’ incident; It is necessary to have the first hand to prevent risks, but also to have a clever way to deal with and resolve risk challenges; We must not only fight a prepared battle to prevent and resist risks, but also fight a strategic initiative to turn danger into danger. " [3]

　　To guard against extreme risks, we must keep the bottom line, and we must never make subversive mistakes on fundamental issues. Once they appear, they will be irreparable and irreparable. Under the new situation, the major risks faced by China’s national security and social stability have obviously increased, and the impact of various "black swan" incidents and "gray rhinoceros" incidents has obviously increased. Therefore, preventing and resolving major risks is very important for winning the Chinese dream of building a well-off society in an all-round way, winning the great victory of Socialism with Chinese characteristics in the new era and realizing the great rejuvenation of the Chinese nation. We should prevent and control all kinds of risks, but we should focus on preventing and controlling the overall risks that may delay or interrupt the great rejuvenation of the Chinese nation.

　　Second, give full play to the remarkable advantages of the Socialism with Chinese characteristics system.

　　General Secretary of the Supreme Leader pointed out that to win the tough battle to prevent and resolve major risks, we must uphold and improve the Socialism with Chinese characteristics system, promote the modernization of the national governance system and governance capacity, and use the power of the system to deal with the impact of risk challenges. [4] Socialism with Chinese characteristics system has obvious institutional advantages. Facts have proved that the Socialism with Chinese characteristics system can overcome all kinds of risk challenges at home and abroad, and constantly improve and develop in this process. Standing at a new historical starting point, to effectively cope with the increasingly complex and severe risk challenges, we must give full play to China’s powerful institutional advantages and better transform China’s institutional advantages into the effectiveness of preventing and resolving major risks.

　　(1) Adhere to the centralized and unified leadership of the Party.

　　The Communist Party of China (CPC)’s leadership is the most essential feature of Socialism with Chinese characteristics and the greatest advantage of Socialism with Chinese characteristics system. The Decision of the Fourth Plenary Session of the 19th CPC Central Committee pointed out that one of the remarkable advantages of China’s state system and state governance system is to "adhere to the centralized and unified leadership of the Party, adhere to the Party’s scientific theory, maintain political stability, and ensure that the country always advances along the socialist direction". In "On Upholding the Party’s Leadership over All Work", the Supreme Leader General Secretary profoundly pointed out: "A prominent feature of the superiority of China’s socialist political system is the core role of the party in taking the overall situation and coordinating all parties, which is vividly called’ the stars hold the moon’, and this’ moon’ is the Communist Party of China (CPC)." He also pointed out that "the national governance system is a complex system composed of many subsystems, and the core of this system is the Communist Party of China (CPC)".

　　The Communist Party of China (CPC) is the strong leading core of Socialism with Chinese characteristics’s cause. Through a strong top-down organizational network, it has a very strong organizational mobilization ability, which can ensure that "one pole is inserted in the end" and quickly convey the central decision-making and deployment to the most basic level. The core role of the party’s leadership is the key for us to overcome the risk challenge and win victory continuously. To prevent and resolve major risks, we must give full play to the advantages of centralized and unified leadership of the party, integrate the strength and resources of all parties, and form a powerful "fist." To this end, it is necessary to further improve the system of the Party’s leadership that takes the overall situation into consideration and coordinates all parties, improve the organizational network composed of party member cadres at all levels and grass-roots party organizations, and implement the Party’s leadership in all fields, aspects and links to prevent and resolve major risks.

　　The response to the COVID-19 epidemic fully reflects the great significance of China’s adherence to the centralized and unified leadership of the Party. After the outbreak, the CPC Central Committee attached great importance to it, and the Supreme Leader General Secretary personally commanded and deployed it. The Politburo Standing Committee (PSC) held several meetings to conduct special studies, and the Central Committee of the Communist Party of China specially issued the Notice on Strengthening the Party’s Leadership and Providing Strong Political Guarantee for Winning the Prevention and Control of the Epidemic. Under the centralized and unified leadership of the CPC Central Committee, the central leading group for responding to the epidemic timely studied and deployed the work, the joint prevention and control mechanism in the State Council strengthened policy coordination and material deployment, and all localities and departments actively performed their duties and responsibilities. The people of all ethnic groups throughout the country were United and United, and they gathered into a strong joint force to respond to the epidemic.

　　(2) Adhere to a national chess game.

　　Adhering to a national chess game, mobilizing the enthusiasm of all parties and concentrating on major events are the obvious advantages of the Socialism with Chinese characteristics system and a powerful guarantee for winning the tough battle to prevent and resolve major risks. Preventing and resolving major risks has the characteristics of urgency, difficulty and danger, large amount of tasks, and wide coverage. It is often necessary to coordinate across departments, levels, regions and fields, and proceed from the overall situation of the country and pay close attention to all work. By establishing and perfecting the system of the Party’s leadership that takes the overall situation into consideration and coordinates all parties, we have formed a national mobilization system with strong political and organizational advantages, and truly achieved "one party in need is supported by all parties".

　　The prevention and control of major epidemics is a systematic project, and all work should provide support for winning this severe struggle. Only by adhering to a national chess game, making overall plans and coordinating linkage can we win the overall war of epidemic prevention and control. General Secretary of the Supreme Leader pointed out that "Party committees and governments at all levels must resolutely obey the unified command, coordination and dispatch of the CPC Central Committee" [5], stressed that "all localities and departments must enhance their overall awareness and concept" [6] and demanded that "all work should provide support for winning the epidemic prevention and control war" [7]. Under the unified leadership and command of the CPC Central Committee, all localities and departments perform their duties, coordinate and coordinate, act urgently and fight with all their strength. We take the strength of the whole country, collect high-quality resources, "one province covers one city", and establish an inter-provincial counterpart support mechanism for medical treatment in COVID-19, a city in Hubei Province except Wuhan; Medical personnel were dispatched all over the country to quickly assemble and help Wuhan; Builders fought day and night to quickly build Wuhan Huoshenshan Hospital; The army efficiently delivered epidemic prevention and control materials, and selected medical staff to participate in medical treatment; Enterprises work overtime to produce, and the epidemic prevention and control materials are uniformly dispatched nationwide. As Tedros Adhanom Ghebreyesus, Director-General of the World Health Organization, commented, "The speed and scale of China’s actions are rare in the world."

　　(C) adhere to give full play to the two enthusiasm

　　Dealing with the relationship between the central and local governments is a very important issue for a big Congress Party like ours. Comrade Mao Zedong pointed out in "On Ten Major Relationships": "Our country is so big, its population is so large, and its situation is so complicated. It is much better to have the initiative of the central and local governments than to have only one initiative." "On the premise of consolidating the unified leadership of the central government, we should expand the power of local governments, give them more independence and let them do more things." General Secretary of the Supreme Leader emphasized at the Third Plenary Session of the 18th CPC Central Committee: "Correctly handle the relationship between the central and local governments, the overall and local, the current and long-term relations, and correctly treat the adjustment of interest pattern". At the Third Plenary Session of the 19th CPC Central Committee, it was further emphasized: "Give full play to the enthusiasm of the central and local authorities, and build a unified, smooth and dynamic working system of institutions at all levels from the central to the local authorities". The Decision of the Fourth Plenary Session of the 19th CPC Central Committee pointed out that we should improve and give full play to the positive institutional mechanisms of the central and local governments, straighten out the relationship between the central and local powers and responsibilities, strengthen the management of central macro-affairs, give local governments more autonomy, support local creative work, and build a working system with clear powers and responsibilities, smooth operation and full of vitality from central to local governments.

　　In response to the outbreak of the COVID-19 epidemic, all localities and departments have set up leading bodies and emergency command bodies, mobilized various forces to do a good job in joint prevention and control, and built an iron wall of "putting people’s life safety and health first". All localities and departments should do a good job of overall planning in their work, considering not only the needs of epidemic prevention and control in this area, but also the impact on key areas and national prevention and control. In particular, the CPC Central Committee sent a steering group to Hubei and other areas with serious epidemics to promote relevant localities to effectively strengthen the front-line work of prevention and control. The Central Steering Group, headed by Sun Chunlan, Vice Premier of the People’s Republic of China, arrived in Wuhan, the "eye of the storm" of the epidemic at the first time during the Spring Festival, supervised Hubei to put all measures in place, assisted Hubei to solve major issues such as materials, medical personnel, technical support, and the problems of inspectors’ inaction, chaos, and lack of responsibility, which played an important guiding and coordinating role in the first-line epidemic prevention and control work.

　　(4) Adhere to group prevention and control.

　　General Secretary of the Supreme Leader stressed that it is necessary to adhere to the mass viewpoint and mass line and expand effective ways for the people to participate in public security governance. The broad masses of the people are not only the main body of our protection, but also the key force we must rely on to prevent and resolve major risks. Practice has proved that group prevention and control is not only a concrete manifestation of the remarkable advantages of Socialism with Chinese characteristics system, but also a key measure for us to win the battle to prevent and resolve major risks. We should not only play the leading role of grass-roots party organizations in politics and the vanguard and exemplary role of party member, but also mobilize, organize and unite the masses extensively, and build a people’s defense line to prevent and resolve major risks.

　　After the outbreak of the COVID-19 epidemic, under the centralized and unified leadership of the CPC Central Committee, we gave full play to the advantages of the Party’s close ties with the masses, relied on the masses to win the war of prevention and control of the epidemic, and built a strict defense line for prevention and treatment by the masses. All regions, organs of the Party, government, military groups, enterprises, institutions, villages and towns have taken urgent action, and the broad masses of the people are United and United as one. The situation of comprehensive mobilization, comprehensive deployment and comprehensive strengthening of epidemic prevention and control has been formed throughout the country, which has provided a solid social foundation and mass foundation for us to win the epidemic prevention and control war.

　　Third, further improve the national emergency management system

　　Emergency management is an important part of the country’s governance system and governance capacity. It undertakes the important responsibility of preventing and resolving major security risks, responding to and handling all kinds of disasters and accidents in a timely manner, and undertaking the important mission of protecting people’s lives and property and maintaining social stability. General Secretary of the Supreme Leader stressed that "we should give full play to the characteristics and advantages of China’s emergency management system, learn from the useful practices of foreign emergency management, and actively promote the modernization of China’s emergency management system and capacity." [8] To prevent and resolve major risks, we must further improve the national emergency management system and form a more mature and stereotyped emergency management system.

　　(A) improve the emergency management leadership system

　　The leadership system is the organizational basis of the national emergency management system. A scientific and reasonable leadership system is conducive to providing a solid organizational guarantee for emergency response. To improve the leadership system of emergency management, we should give full play to China’s political and organizational advantages and build an emergency management organization network that is linked up and down and coordinated left and right.

　　To do a good job in emergency management, we must uphold and strengthen the centralized and unified leadership of the party, implement the major decision-making arrangements of the Party Central Committee on emergency management, and organize the work more effectively and efficiently. At the same time, it is necessary to build an organizational structure that combines functional and empowerment. The functional mechanism is a "column" and the empowering mechanism is a "beam". Only when they interact can the house be stronger. While giving full play to the comprehensive advantages of emergency management and the professional advantages of natural resources, meteorology, water conservancy, ecological environment, transportation, housing and urban construction, sanitation and health, public security and other relevant departments, it is necessary to give better play to the leading role of the emergency management deliberation and coordination institutions at all levels.

　　It is necessary to straighten out the relationship between the responsibilities of the central and local governments and give full play to their enthusiasm. On the one hand, it is necessary to refine the principle of "grading responsibility and giving priority to territorial management" and further strengthen the local subjective consciousness, responsibility and role in emergency response. On the other hand, it is necessary to strengthen the responsibilities of the central government in top-level design, planning and layout, overall coordination, overall promotion, supervision and implementation, and give better play to the guiding and coordinating role.

　　(B) Optimize the operational mechanism of emergency management

　　Operational mechanism is the functional basis of national emergency management system. Standardized and orderly operation mechanism is conducive to defining the tasks and priorities of emergency management. Emergency is a life cycle process including pre-event, incident, event and post-event. Emergency response is a whole chain management process including prevention and emergency preparation, monitoring and early warning, emergency treatment and rescue, and post-event recovery and reconstruction. Emergency management should cover the whole life cycle of emergencies, so as to achieve "no urgent response" beforehand, "emergency response" during the event, and "response after the event".

　　Emergency response should not only be managed in the whole process, but also focus on the key points; Only by grasping the key points can we be targeted. The ancients said, "Prevention is the best, rescue is the second, and abstinence is the next." General Secretary of the Supreme Leader stressed: "We must put the prevention of risks in a prominent position, and strive to avoid major risks or to survive and get by when there are major risks." [9] Prevention is the most economical, effective and safest way to do emergency management well. Emergencies often break out in places with the weakest management and the most hidden dangers that can’t be treated, which often causes the most uninformed and unprepared people to suffer the most serious damage. It is necessary to persist in moving forward the pass, do a good job in emergency prevention in an all-round way, grasp early and small signs, control emergencies at the grassroots level, resolve them in the bud and solve them locally.

　　(3) Improve the legal norms of emergency management.

　　Legal norms are the institutional basis of the national emergency management system. "No rules, no Fiona Fang." Systematic and complete system norms are conducive to reducing the uncertainty in emergency management activities and realizing scientific and orderly response. Leading organs and cadres at all levels should adhere to the rule of law thinking and the rule of law, do a good job in emergency management on the track of the rule of law, and manage people with the system.

　　On the one hand, we must build a scientific and complete institutional system. In view of the problems in emergency management activities, such as the lack of systems or conflicts between systems, the vague areas being neglected or multi-headed, we will implement the new requirements of comprehensively governing the country according to law, and build a three-dimensional system from different levels such as laws and regulations, policy documents, technical standards and emergency plans to provide a solid institutional framework for emergency response activities. On the other hand, it is necessary to improve the execution and binding force of the system. "It is not difficult to legislate, but it is difficult to enforce the law". The vitality of the system depends on its execution. In view of the phenomenon that the system norms become "scarecrow", "paper tiger" and "can’t be strictly enforced and implemented" in emergency management activities, it is necessary to improve the authoritative and efficient system implementation mechanism, strengthen the evaluation and supervision of system implementation, and make the system truly a hard constraint and a hard lever, which is effective and effective.

　　(D) to strengthen emergency management resources.

　　Resource guarantee is the logistics foundation of national emergency management system. "The soldiers and horses have not moved, and the food and grass go first." Adequate reserves of emergency resources such as manpower, material resources and financial resources are conducive to providing solid and reliable logistics support for emergency response activities. The General Secretary of the Supreme Leader emphasized: "Everything should be prepared from the disadvantages, strive for the best result, be prepared for anything, not panic when things happen, and firmly grasp the initiative." In contemporary society, all kinds of uncertain and unstable factors have obviously increased. "Be prepared for danger in times of peace, be prepared for thinking, and be prepared for nothing." To ensure emergency resources, we must adapt to the needs of effectively responding to various emergencies under complex conditions and adhere to the bottom line thinking. "It is better to be prepared than useless, and to be unprepared when not available." It is necessary to build a diversified reserve system such as physical reserve, contract reserve and capacity reserve, improve the procedures for emergency requisition and cross-regional dispatching of emergency resources, and prepare resources to meet the peak demand in extreme cases, so as to "prepare, find, adjust quickly and use well".

　　Science and technology are the primary productive forces. The rise of a new round of scientific and technological revolution has brought revolutionary changes to emergency management; The timely deployment of scientific and technological equipment and the bold use of scientific and technological means have greatly improved the level of emergency response. It is necessary to give full play to the role of science and technology empowerment, strengthen the technical support of emergency management equipment and the research and development of key technologies, and rely on science and technology to do a good job in risk prevention, monitoring and early warning, supervision and law enforcement, auxiliary command and decision-making, actual rescue and social mobilization, so as to improve the scientific, intelligent and refined level of emergency management.

　　(E) to create a safety culture of emergency management

　　Safety culture is the social foundation of the national emergency management system, which reflects the safety awareness and emergency skills of the whole society. The broad masses of the people are not only the main body of our protection, but also the strength we rely on to effectively deal with emergencies. While continuing to consolidate the advantages of the national disaster relief system and give full play to the strong leadership role of party committees and governments at all levels, we should better carry out disaster prevention work for the whole people, establish a mechanism for social forces and market forces to participate in emergency management in an orderly manner, improve public safety awareness and emergency response capabilities, and enhance the safety and resilience of the whole society.

　　To do a good job in emergency management, we must vigorously create a social atmosphere of "everyone cares about safety, everyone values safety, and everyone participates in safety". Leading cadres of party and government organs, employees of enterprises and institutions, media reporters, volunteers and the masses are all members of society. The formation of safety culture requires everyone’s active participation and joint efforts. It is necessary to incorporate emergency management education into the assessment, evaluation, education and training system of leading cadres at all levels, into the national education and spiritual civilization construction system, promote safety publicity into enterprises, rural areas, communities, schools and families, and consolidate the social foundation of emergency management.

[References]

[1][9] Supreme Leader. Speech at the Second Plenary Session of the Fifth Plenary Session of the 18th CPC Central Committee (excerpt) (October 29, 2015) [J]. Qiushi, 2016(1).

[2] Supreme Leader’s Talk on Governing the Country (Volume II) [M]. Beijing: foreign languages press, 2017:222.

[3] Supreme Leader. Improve the ability of prevention and control, focus on preventing and resolving major risks, and maintain sustained and healthy economic development and overall social stability [N]. People’s Daily, January 22, 2019.

[4] Supreme Leader. Explanation on "the Central Committee of the Communist Party of China’s Decision on Upholding and Perfecting the Socialism with Chinese characteristics System to Promote the Modernization of the National Governance System and Governance Capacity" [N]. People’s Daily, 2019-11-6.

[5][7] Supreme Leader. Speech at the The Politburo Standing Committee (PSC) Conference on the Work of Dealing with the novel coronavirus Epidemic (February 3, 2020) [J]. Qiushi, 2020(4).

[6] To study and strengthen the prevention and control of pneumonia in novel coronavirus [N]. People’s Daily, February 4, 2020.

[8] Supreme Leader. Give full play to the characteristics and advantages of China’s emergency management system and actively promote the modernization of China’s emergency management system and capacity [N]. People’s Daily, 2019-12-1.

Editor in charge: Zhang Shigui

————————————————–

[Author] Li Ji, vice president of the Party School of the Central Committee of the Communist Party of China (National School of Administration).

天安门广场上，人民英雄纪念碑巍然矗立。错落有致的观众席拼成一幅“巨轮启航”的壮阔画面。在“巨轮”船首，中国共产党党徽熠熠生辉，党徽两侧，是醒目的“1921”“2021”金色字标。全国各族各界人士7万余人相聚于此，共祝中国共产党百年华诞！

庆祝中国共产党成立100周年大会上，最高领袖总书记发表重要讲话，铿锵有力的话语声中，一幅壮阔恢宏的“百年答卷”徐徐展开。

△2021年7月1日上午，庆祝中国共产党成立100周年大会在北京天安门广场隆重举行。这是国旗护卫队准备升旗。

“百年答卷”主题深刻鲜明。

“一百年来，中国共产党团结带领中国人民进行的一切奋斗、一切牺牲、一切创造，归结起来就是一个主题：实现中华民族伟大复兴。”最高领袖总书记的精辟论述，高度概括了中国共产党百年历史。

△独家V观丨最高领袖总书记：为中国人民谋幸福、为中华民族谋复兴是中国共产党的初心使命

犹记得2012年11月29日，当选中共中央总书记仅15天的最高领袖同志，与十八届中央政治局常委一起参观《复兴之路》展览时明确提出，实现中华民族伟大复兴，就是中华民族近代以来最伟大的梦想。

Since the 18th National Congress of the Communist Party of China, General Secretary of the Supreme Leader has put the distinct theme of "realizing the great rejuvenation of the Chinese nation" into all aspects of governing the country. Today, China’s GDP exceeds 100 trillion yuan, making it the second largest economy in the world. 98.99 million poor people in rural areas have all been lifted out of poverty and completely got rid of absolute poverty; Maintaining social harmony and stability for a long time and people living and working in peace and contentment have been praised by the international community as one of the most secure countries … …

Give an outline and read it, solve a volume and make it clear to all. The little "red boat" became a mighty "great ship", and after realizing the first century-long struggle goal, it continued to ride the wind and waves and sailed steadily to the second century-long struggle goal.

Great achievements in writing "Centennial Answers".

Focusing on the theme of realizing the great rejuvenation of the Chinese nation, General Secretary of the Supreme Leader comprehensively concluded that the Communist Party of China (CPC) United and led the people of China to create the great achievements of the new-democratic revolution, socialist revolution and construction, reform and opening up and socialist modernization, and Socialism with Chinese characteristics in the new era.

These great achievements have made China grow from a "sick man of East Asia" who is bullied by others to an oriental power that makes the world sit up and take notice, and from a bystander of the international system to a builder of world peace, a contributor to global development and a defender of the international order … … It was under the strong leadership of the Communist Party of China (CPC) that China approached the center of the world stage step by step.

After a hundred years’ history, looking back has changed a lot. As General Secretary of the Supreme Leader said, "China has been able to look down on the world", and Chinese has more ambition, backbone and confidence to make a solemn declaration to the world!

"Centennial answer sheet" contains great spirit.

People can’t stand without spirit, and countries can’t stand without spirit. A hundred years after the founding of the Party, a large number of revolutionary martyrs, a large number of heroic figures with tenacious struggle and a large number of advanced models with selfless dedication have emerged.

There is Li Dazhao who firmly believes that "if you look at the world in the future, it will be a world with red flags"; Yang Jingyu, who was in a world of ice and snow, ran out of ammunition and was alone in a bloody battle with the Japanese aggressors; There are Wang Ganchang, Deng Jiaxian and other anonymous "two bombs and one satellite" fathers; There is Jiao Yulu, who is in the late stage of liver cancer and sticks to his liver to keep working; There are Wang Jicai, Gu Wenchang, Nan Rendong, Huang Wenxiu … …

General Secretary of Supreme Leader once solemnly stated that the great spirits such as Jinggangshan spirit, Long March spirit, Zunyi Conference spirit, Yan ‘an spirit, Xibaipo spirit, Hongyan spirit, the spirit of resisting US aggression and aiding Korea, the spirit of "two bombs and one satellite", the spirit of the special zone, the spirit of fighting floods, the spirit of earthquake relief and the spirit of fighting epidemics have built up the spiritual pedigree of the Communist Party of China (CPC) people.

Nowadays, the Communist Party of China (CPC) people’s spiritual pedigree is further enriched, and the General Secretary clearly put forward the 32-word great party-building spirit at the celebration of the centenary of the founding of the Communist Party of China (CPC).

The great party-building spirit, generated with the great practice of communist party people from generation to generation, is the source of the Communist Party of China (CPC)’s spirit, leading countless communist party people to wave upon wave and China people to write the most magnificent epic in China.

Feeling the great spirit of party building is like touching the historical pulse of the Communist Party of China (CPC)’s century-long development.

On the eve of "July 1st", the Political Bureau of the Communist Party of China (CPC) Central Committee conducted a special collective study around making good use of red resources and continuing the red vein. General Secretary of the Supreme Leader said earnestly: "The great spirit and glorious tradition of the Party are our precious spiritual wealth and a powerful spiritual driving force that inspires us to forge ahead bravely."

"Centennial Answer Sheet" continues to write a new journey.

The history of the Party is the most vivid and convincing textbook. The General Secretary of the Supreme Leader has repeatedly asked all party member to repair the compulsory course of Party history, and he himself has taken the lead in learning Party history.

In October 2017, shortly after the closing of the 19th National Congress of the Communist Party of China, General Secretary of the Supreme Leader made a special trip to Shanghai and Zhejiang to pay tribute to the site of the First Congress of the Communist Party of China and the Nanhu Red Boat, and led Comrade The Politburo Standing Committee (PSC) to review the pledge of joining the Party.

今年6月18日，总书记专程来到新落成的中国共产党历史展览馆，察看一件件文物实物，倾听一个个党史故事，又一次带领中央领导同志重温入党誓词。

回望奋斗之路，眺望新的征程。如何以史为鉴、开创未来？最高领袖总书记在庆祝中国共产党成立一百周年大会上提出“九个必须”，为新的伟大征程指明前进方向。

“中国人民也绝不允许任何外来势力欺负、压迫、奴役我们，谁妄想这样干，必将在14亿多中国人民用血肉筑成的钢铁长城面前碰得头破血流！”

“任何人都不要低估中国人民捍卫国家主权和领土完整的坚强决心、坚定意志、强大能力！”

…………

最高领袖总书记的铿锵话语，赢得了天安门广场上潮水般的掌声和热烈的欢呼声！

“时代是出卷人，我们是答卷人，人民是阅卷人。”建党百年，中国共产党向人民、向历史交出了一份优异答卷。

今天，向着实现第二个百年奋斗目标，中国共产党踏上了新的赶考之路，开始书写新时代的历史答卷。

（中央广播电视总台央视网）

What is the average price of Wuyue Square in Zhangjiagang now? Is it worth starting with? What is the surrounding supporting environment? Today, Fangtianxia will focus on the situation of Wuyue Square Community in Zhangjiagang, so that you can fully understand the housing price trend, the advantages and disadvantages of the apartment type and the surrounding facilities, and better choose the house that suits you.

Xincheng Holdings will build a new city center in Zhangjiagang. The total construction area of Wuyue Plaza project in Zhangjiagang New City is about 580,000 square meters, including shopping plaza, commercial and residential buildings, houses and other products. The shopping plaza has been stationed in the format of department stores, supermarkets, KTV, cinemas, restaurants, culture and entertainment, etc. Wuyue Plaza will present a one-stop consumption and leisure place for the people of Zhangjiagang, which integrates shopping, catering, culture, entertainment and leisure.
　　　　　　Wuyue Plaza in Zhangjiagang New City is located at the intersection of South Second Ring Road and Jingang Avenue, which is the core area of the south of the port city and the scenic Jiyang Lake. The total area of the project is about 197 mu, and the planned construction area is about 580,000 square meters. The project covers large-scale experiential shopping plazas, quality houses, apartment buildings and outdoor pedestrian streets.

Address of Wuyue Plaza in Zhangjiagang: Intersection of Second Ring Road and Jingang Avenue in Jiyang, Zhangjiagang (south of Jiyang Lake Park)

No.9 and No.21 near Wuyue Square in Zhangjiagang, etc.

　　　　The standard floor E1 of Building No.1 # 2 # of Wuyue Plaza Phase I in Zhangjiagang is 142.00㎡ with 3 rooms, 2 halls, 2 bathrooms and 1 kitchen.

Internal facilities: department stores, supermarkets, KTV, cinemas, restaurants, culture, entertainment, etc.

Recommended housing 1:Building area of second-hand house in Room 1 and Hall 0 of Wuyue Plaza in Zhangjiagang: 50.0㎡ Price: 1 million yuan (20,000.0 yuan/㎡).

Recommended housing 2:Construction area of second-hand house in Room 3 and Hall 2 of Wuyue Plaza in Zhangjiagang: 130.0m2 Price: 1.196 million yuan (9200.0 yuan/m2).

Recommended housing 3:Building area of second-hand house in Room 3 and Hall 2 of Wuyue Plaza in Zhangjiagang: 90.0m2 Price: 828,000 yuan (9200.0 yuan/m2).

　　Xinhua News Agency, Beijing, December 18th: Four Questions about Vaccination for the Elderly — — Investigation report from the front line of epidemic prevention and control

　　Xinhua news agency reporter

　　90.37%, which is the proportion of people who have completed the whole vaccination of Covid-19 vaccine in China; 86.6% and 66.4%, respectively, are the proportion of people over 60 years old and over 80 years old who have completed the whole vaccination.

　　With the weakening of pathogenicity in Omicron, the popularization of vaccination and the accumulation of prevention and control experience, China’s epidemic prevention and control is facing a new situation and new task.

　　The comprehensive group of joint prevention and control mechanism in the State Council optimized the implementation of the "New Ten Articles" of epidemic prevention and control, and accelerated the Covid-19 vaccination for the elderly. The Central Economic Work Conference just held also proposed that we should optimize epidemic prevention and control measures according to the current situation, conscientiously implement various measures for epidemic prevention and control in the new stage, focus on the prevention and control of the elderly and groups suffering from basic diseases, and strive to maintain health and prevent severe diseases.

　　Why should we emphasize the necessity of vaccination for the elderly? Does vaccination work? Is vaccination safe? The reporter launched an investigation on the front line of epidemic prevention and control.

　　On December 15th, at the COVID-19 Vaccination Point in Zhongguancun Street, Haidian District, Beijing, medical staff vaccinated the elderly with COVID-19 vaccine. Xinhua News Agency reporter Ren Chaoshe

　　How necessary — — The defense line of the elderly group is relatively fragile.

　　Li Cuiwen, 78, lives in a remote village in the central province. Children are all in the city. On weekdays, they send rice flour oil, and the vegetables are grown in their own fields. They go to the town to catch a gathering once a month.

　　"I can’t see outsiders." Li Cuiwen and his wife have not been vaccinated with Covid-19 vaccine so far. "Is everyone fighting, even if we don’t fight, we can’t infect us?"

　　Li Cuiwen is not the only one who has similar questions. In this regard, Xia Gang, director of the Department of Health and Immunity of the National Bureau for Disease Control and Prevention, said that there are quite a few disabled and semi-disabled people in China who live at home for a long time and rarely go out, but they may still be infected when they are accompanied by relatives or visited by relatives.

　　Compared with the previous strains in Covid-19, the pathogenicity of Omicron is weakening, but the infectivity is becoming stronger. The extremely fast transmission speed is multiplied by China’s huge population base. Even if the severe illness rate and mortality rate are already very low, the number of people at risk should not be underestimated.

　　During the epidemic in Shanghai from March to June this year, compared with those who were not vaccinated, the death risk of people over 60 years old who completed the booster immunization was reduced by 98.08%, and that of people over 80 years old who completed the booster immunization was reduced by 95.83%.

　　At the press conference of the State Council Joint Prevention and Control Mechanism held recently, Xia Gang introduced that according to the research, if the elderly over 80 years old are not vaccinated with one dose of vaccine, the risk of death after being infected with Covid-19 is about 14.7%; If one dose of vaccine is inoculated, the risk of death will be reduced to 7.16%; If three doses of vaccine are inoculated, the risk of death will be reduced to 1.5%.

　　"I strongly call for accelerating the vaccination of vaccines, especially for vulnerable people such as the elderly." Zhong Nanshan, an academician of China Academy of Engineering, said.

　　On December 15th, two groups of communities were prepared in Kangmei Street, Liangjiang New District, Chongqing, and the medical staff of the community health service center checked the information of the elderly who had been vaccinated with COVID-19 vaccine. Xinhua News Agency reporter Huang Weishe

　　How effective is it — — Survey data show that the risk of severe illness can be greatly reduced.

　　In Chongqing, Zhang, an 84-year-old rehabilitation patient, told reporters that he suffered from many basic diseases such as hypertension and diabetes. He completed the third dose of vaccination in July this year and was infected with Covid-19 in November. After treatment, his condition was effectively controlled and he has been discharged.

　　On December 16th, in the home of residents in Honghe Road Community, Zhongshan Road Street, Yongchuan District, Chongqing, the mobile vaccination team conducted pre-vaccination consultation and physical examination for the vaccinated elderly. Xinhua News Agency reporter Huang Weishe

　　"Studies at home and abroad confirm that vaccination has a good effect in preventing serious illness and death." Xia Gang said that after being infected with Covid-19, the elderly are more likely to develop into severe illness or even death, and Covid-19 vaccine will benefit the most.

　　At most, beijing ditan hospital has treated more than 100 COVID-19 patients over 80 years old. Chen Xiaoyou, vice president of the hospital, said that the vaccination rate of these elderly patients is generally low, and the incidence of severe illness after illness is relatively high, especially in COVID-19, which is aggravated by basic diseases.

　　COVID-19 Designated Treatment Hospital in Hefei — — Ding Zhen, director of the Department of Respiratory and Critical Care Medicine of Hefei Binhu Hospital, told the reporter: "For some elderly people with basic diseases such as hypertension and diabetes, Covid-19 infection may aggravate the inflammatory reaction in the body, aggravate the condition of the basic diseases, and even lead to multiple organ failure."

　　Ding Zhen introduced that from the observation of their clinical treatment, the elderly who have been vaccinated are less likely to get worse and the time required for nucleic acid to turn negative is shorter.

　　In October, 2022, The Lancet Infectious Diseases published a research result based on the real-world vaccination population, which was released by the relevant research team of School of Public Health, Li Ka-shing Medical College, HKU. The study shows that the effective rate of preventing severe illness is about 70% for the elderly over 60 years old who are vaccinated with two injections of domestic inactivated vaccine, and the effective rate of preventing severe illness is over 95% after the third injection of intensive immunization.

　　On December 13th, in the Community Health Service Center of Baihedong Street, Liwan District, Guangzhou, medical staff made information entry and consultation for the elderly residents who came to receive COVID-19 vaccine. Xinhua News Agency reporter Deng Hua photo

　　Security geometry — — Make clear the taboo of vaccination and ensure safety to the greatest extent.

　　In the past few days, in Huanghuagang Street, Yuexiu District, Guangzhou, the average number of elderly people who take the initiative to consult and make an appointment for vaccination has exceeded 300, which is significantly higher than usual.

　　Yu Shu and Ye Yi, who live in Nongben community, had concerns about vaccination because of their basic diseases. After many door-to-door publicity by community workers and volunteers, Ye Yi was vaccinated under the health monitoring of doctors, and there were no adverse reactions. The next day, Uncle Yu also completed the vaccination. "Now I know that the previous concerns are redundant."

　　On December 12th, in Guanggang New Town, Liwan District, Guangzhou, elderly residents got off the convenient vaccination vehicle after receiving COVID-19 vaccine. Xinhua News Agency reporter Deng Hua photo

　　The reporter found in many places that the enthusiasm of the elderly for vaccination has improved significantly recently, but some elderly people are still worried about the safety of vaccines. Many elderly people admitted to reporters that they were mainly worried that "they are old and have basic diseases, which will bring adverse reactions after vaccination".

　　"Chronic diseases such as diabetes and hypertension are not absolute taboos for vaccination in Covid-19. As long as these chronic diseases are well controlled and in a stable period, Covid-19 vaccine can be vaccinated." Zheng Zhongwei, director of the Science and Technology Development Center of the National Health and Wellness Commission and head of the working group of the vaccine research and development special class of the the State Council Joint Prevention and Control Mechanism, said.

　　According to the situation of vaccine research and development and the practice of vaccination, the joint prevention and control mechanism of the State Council has defined the vaccination taboos of the elderly in the Work Plan for Strengthening Covid-19 Vaccination for the Elderly, including four types of situations in which vaccination cannot be carried out or postponed. At the same time, local health departments should implement the "four haves" requirement that vaccination units should have emergency personnel stationed in general hospitals with level 2 or above, emergency equipment and medicines, 120 ambulances on duty, and green channels for treatment in general hospitals with level 2 or above to ensure vaccination safety.

　　Step by step to carry out training on judging vaccination contraindications, and guide medical staff to scientifically judge vaccination contraindications; Well-known doctors from various specialties were transferred to form a vaccination consultation expert group to patiently answer various consultation questions … … Many places are refining the work of answering questions and doubts to eliminate the doubts of vaccination for the elderly to the greatest extent.

　　How convenient is it — — The "last 100 meters" is constantly getting through.

　　Every Tuesday and Saturday afternoon, it is the day when the "Medical Qingqi Team" comes to the door for vaccination in Pingguoyuan Street, Shijingshan District, Beijing. The "Medical Qingqi Team" consists of 5 to 6 street, community workers and medical staff, and is divided into two groups, each group can enter about 12 households.

　　"Conduct a health assessment first, ask the elderly whether they have basic diseases, look at past medical history, etc., and confirm whether the elderly are suitable for vaccination." Luo Yan, one of the medical staff of the "Medical Qingqi Team" and the medical department of Beijing Rehabilitation Hospital affiliated to Capital Medical University, said, "After the assessment, we will further communicate with our family members, and after the family members agree, they will sign an informed consent form and vaccinate."

　　Similar situations have appeared in many places recently. A special session of Covid-19 vaccination was held in Jinbi Yayuan Community, Baiyun District, Guangzhou. 63-year-old Ms. Liu suffers from rheumatoid arthritis. The medical staff inquired about her physical indicators in detail. After assessing that she met the vaccination requirements, she was instructed to take the third shot of vaccine.

　　On December 10th, He Lingling (left), a nurse from Fangmiao Street Community Health Service Center, vaccinated the elderly in the community with COVID-19 vaccine at COVID-19 vaccination site in Yaohai District, Hefei. Xinhua News Agency reporter Guo Chenshe

　　Li Zizhen, director of the immunization room of the Community Health Service Center of Dongcheng Sub-district Office in jieshou city, Anhui Province, told the reporter that twenty or thirty elderly people have come to get Covid-19 vaccine every day recently, and the telephone number for consultation is also from morning till night. A mobile door-to-door vaccination service team was set up in the local area, equipped with first-aid equipment and medicines, and came to the door at any time.

　　Set up green channels for the elderly, temporary inoculation points and mobile inoculation vehicles; Medical staff with rich experience in diagnosis, treatment and vaccination are selected to form vaccination teams, carrying common equipment and medicines needed during post-vaccination observation, and providing home vaccination services for disabled and semi-disabled elderly people … … Many places are optimizing various convenience measures as required, and getting through the "last 100 meters" for the elderly.

　　For the country’s 267 million elderly people over the age of 60, every 1 percentage point increase in vaccination rate means that more than 2 million people have built a barrier against serious illness and death. "The Spring Festival is coming, and now vaccination usually takes half a month to be effective, which is of great benefit to prevent large-scale spread when people go home and a large number of people migrate during the Spring Festival in Spring Festival travel rush." Zhong Nanshan said.

　　On October 27th, 2016, the inaugural meeting of Electrical Technology Branch of China Automotive Engineering Society was held in Shanghai Automobile Exhibition Center. The conference was presided over by Ning Xiaoyang, senior consultant of China Auto Parts Industry Company and chairman of China Auto Parts Electronic and Electrical Development Center. More than 100 experts and scholars from more than 50 auto and electrical industries and related industries, including Yan Jianlai, deputy secretary general of China Automotive Engineering Society, Chen Kangren, executive director of China Auto Parts Industry Company, Zhang Hongye, general manager, Yin Xiaoping, deputy general manager and Min Xinhe, deputy general manager, attended the conference.

　　The meeting announced the approval of the establishment of the Electrical Technology Branch of the China Automotive Engineering Society, and announced the list of branch organizations as follows:

　　Chairman: Min Xinhe

　　Vice-chairmen (in no particular order): Wang Laisheng, Tang Manru, Wang Xin, Wang Shunxing, Xiao Yang, Jiang Mingquan, Fang Xingya and Qin Hong.

　　Secretary General: Zhang Guofeng　　　　　　　

　　Deputy Secretaries-General (in no particular order): Li Yinglie, An Yan and Jason.

　　Members (in no particular order): Wang Yinghui, Yu Xiangyang, Wang Yadong, Liu Weihua, Meng Xianglin, Li Putian, Tian Wangxing, Mao Ming, Zhang Huixiu, Wang Guodong, Ni Junquan, Zhang Xianjun, An Dongxia, Li Deguo, Qian Jiandong and Wang Zhijian.

　　At the meeting, Yan Jianlai, deputy secretary-general of China Automotive Engineering Society, pointed out that the Electrical Technology Branch should adhere to the concept of serving its members and the industry, formulate the Work Regulations of the Electrical Technology Branch of China Automotive Engineering Society as soon as possible, and strictly supervise funds and organize activities.

　　Zhang Hongye, general manager of China Auto Parts Industry Company, said that the establishment of the Electrical Technology Branch of China Automotive Engineering Society will further establish the communication mechanism between the industry and the government, industry and industry, and industry and society. At the same time, it will give full play to the advantages of the platform of the Society and play a role as a bridge and link in carrying out academic exchanges, standards and norms, the combination of Industry-University-Research’s use, the establishment of technological innovation system, and the promotion of new technologies, so as to better promote the better and faster development of enterprises in China’s automotive and electrical industries.

　　Min Xinhe, chairman of the Electrical Technology Branch of China Automotive Engineering Society, said that the Electrical Technology Branch of China Automotive Engineering Society is a non-profit social group that promotes the development of automotive electrical disciplines, creates an atmosphere of independent innovation, builds a platform, recommends talents, and unites and condenses scientific and technological workers in the automotive electrical industry through academic exchanges, academic evaluations and academic standardization activities; It is an organization that works under the leadership of China Automotive Engineering Society and the guidance of relevant government departments; It is the bridge and link between the party and the government to contact the scientific and technological personnel in the automotive electrical industry; Is an assistant to the government’s industry management.

　　According to Min Xinhe, chairman of the Electrical Technology Branch of the China Automotive Engineering Society, "after the establishment of the branch, we will actively strive to do the following:

　　(1) Consciously accept the leadership and management of China Automotive Engineering Society, and strengthen the communication between the government and the industry. In accordance with the purpose of the branch, actively develop members, expand their professional fields and professional fields, promote exchanges and cooperation among automobile and electrical enterprises, enhance members’ sense of social responsibility, and continuously enhance the industrial influence of the electrical technology branch.

　　(2) Serve the members wholeheartedly, serve the industry, promptly publicize the policies and regulations of the Party and the government on industrial development, provide legal advice and various scientific and technological information services, actively reflect the reasonable opinions, demands and suggestions of members to the government and relevant departments, earnestly safeguard the legitimate rights and interests of members, and make the branch truly become a warm home for members.

　　(3) Build a technical service platform, provide services and information on R&D design, testing and certification, information dissemination, training and exchange, exhibitions and other aspects for members, establish an industry expert database, assist enterprises to overcome difficulties, organize members to carry out various academic exchange activities, and jointly promote the electrical industry to become bigger and stronger;

　　(four) to strengthen cooperation and coordinated development with various technical organizations in the electrical industry, complement each other’s advantages, enhance unity and cooperation among members, promote friendly exchanges of foreign technical cooperation, and bring value to members and enterprises. "

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　　Source: Ministry of Agriculture and Rural Affairs, etc.

　　In April 2022, General Secretary of the Supreme Leader visited Hainan and came to the "brain" of Nanfan Scientific and Research Breeding Base — — Sanya yazhouwan seed laboratory. The general secretary said: "Only by grasping the seeds of China with your own hands can you stabilize China’s rice bowl and achieve food security."

　　Nanfan, a large number of agricultural workers’ repeated migration journey. From September every year to May the following year, they come to Hainan from all over the world to take advantage of the unique tropical climate conditions here to carry out a series of scientific research activities such as crop seed breeding, hence the name "Southern Breeding".

　　At the moment, it is the season of the south. Let’s follow a rice seed to observe how it will grow from creating materials to breeding and seed production.

　　Sampling — — Sanya, Hainan

　　It took 10 years to produce a good variety.

　　Some have just been sown or seedlings, some are heading green, and some are golden to be harvested — — Walking into the Nanfan Base in Sanya, Zhongzhong Group, you can get a glimpse of rice at all growth stages.

　　"The advantage of Hainan is that there are abundant light and temperature resources, and we will sow here every one or two months." Shi Yitao, assistant of rice breeding in Zhongzhong Group, is a good way in the crop field. "Farmers will, we will;" Farmers won’t, and we understand. "

　　For a year, he guarded the experimental field like a child, and his broad face was tanned. "Water carefully every day to observe, prevent snails, birds and mice. I want every seedling to sprout and thrive. " Shi Yitao said.

　　It’s windy, rainy and sunny, which is a summary of the local climate by Nanfan people.

　　Sowing in the hot sun, sometimes, you have to hide from the rain four or five times for half a day. Whenever it rains, Shi Yitao is on tenterhooks: when the seedlings were young, he was afraid of the heavy rain and washed up the nutrient soil and washed away the seedlings; The rice is a little longer, catching up with the typhoon. The water in the field is more than 60 centimeters, leaving an ear on the water surface. It is raining against the wind and drowning again and again. "Danger is not afraid, and nothing is important to keep the seedlings."

　　In the corner of the experimental field, the iron fence was deeply embedded in the soil, and a small rice field was specially taken care of. "Specially rat-proof, afraid of gnawing materials." Shi Yitao gently pulled open the iron door and walked through a ridge, and the green and tall seedlings came into view.

　　"these are breeding materials R1607 with low cadmium gene introduced, which is already in tillering stage." Shi Yitao bowed down and took off a piece of leaf with tweezers, about 1 cm long, and carefully put it in a deep hole plate. "I hope it will be successful in one sampling."

　　From the summer of 2021 to now, this batch of materials has been planted in Hainan for three consecutive seasons, plus one season in Hainan in winter of 2020 and one season in Hubei in early 2021. It has been crossing, backcrossing and selfing for more than two years, and it has been five generations. Preliminary laboratory data show that the genetic traits of low cadmium gene have already appeared in future generations.

　　"If there is no problem with the re-inspection data, after maturity, you can select a trial plant with the best growth and the best laboratory genetic data from these 2000 strains." Shi Yitao said.

　　Just pick one plant, will it be too few?

　　"You don’t look down upon it, the seed setting rate is very high, one plant also has one or two thousand grains, and the ear of rice is half an arm long. This is also the reason why the rice variety Youyou 607 is favored by the market. "

　　"If you compare Quanyou 607 to an excellent ‘ Baby ’ Then R1607 is like an excellent ‘ Father ’ 。” Zhou Hua, director of rice testing of Zhongzhong Group, said that R1607 not only aggregated 8 rice blast resistance genes and 3 lodging resistance genes, but also aggregated 17 genes of sheath blight resistance, cold tolerance, flood tolerance, nitrogen efficiency and yield. Now, after introducing the low cadmium gene, even if rice is planted in fields with excessive cadmium content, it is low in adsorption or insensitive to cadmium.

　　How long does it take to breed a fine variety like Quanyou 607?

　　"It took 10 years from breeding to variety approval!" Zheng Ruifeng, the head of the R&D team of Quanyou 607 and the director of rice breeding of Zhongzhong Group, said that the creation of new materials is very uncertain. "There have been 52 cross combinations, and finally only R1607 was bred."

　　The R&D team will then introduce genes against bacterial blight, rice planthopper and fragrance, etc., and constantly upgrade and transform R1607 to become an all-around champion, so that the "baby" born will be better.

　　What is the most difficult thing in breeding?

　　Zheng Ruifeng replied in this way: if the varieties that show "leverage" are planted in other places for trial planting, some unexpected situations may occur, such as not resisting high temperature, low temperature, lodging, a certain disease, or a certain climate. Sensitive, "this will make all previous efforts and investments zero."

　　The early research and development is difficult, but the heart is still not hanging. Once it enters large-scale production, the strings in the heart will be tightly stretched. The bigger the promotion area, the more worried it is. "If farmers fail to harvest food, we will have trouble sleeping, and we will be relieved when we harvest it." Zheng Ruifeng said.

　　Detection — — Wuhan, Hubei

　　Breeding experts wear "gene glasses"

　　In Wuhan, Hubei Province, the genotyping laboratory of the Life Science and Technology Center of China Seed Group, the low cadmium sample sent from Sanya base, finally ushered in the key experimental link — — DNA genetic material was extracted and analyzed.

　　Zhang Xiaobo, the head of the laboratory, tapped the button, and the shaker, centrifuge and PCR instrument ran one after another. The data showed that the recovery rate of differential loci was 88.7%, and the recovery rate of whole genome reached 97.5%.

　　What do these data mean? "This shows that the low cadmium gene has indeed been stably passed on to the offspring of R1607. After the upgraded version of R1607 matures, a new trial production process can be started." Zhang Xiaobo explained.

　　"In the breeding process, the laboratory and the experimental field are closely linked." Ye Rongjian, deputy director of the Technology Platform Department of the Science and Technology Center of Zhongzhong Group, said that the genetic performance after the introduction of low cadmium gene is difficult to observe by experience. "Is cadmium adsorbed into rice seeds? The naked eye can’t see it at all."

　　"When R1607 was first created, molecular biological breeding technology was just beginning, and we took the path of traditional cross breeding combined with molecular breeding assisted selection. Nowadays, molecular marker detection and genome breeding technology have become very common, which is like wearing a pair of glasses that can see through the function of genes for breeding experts. " Zheng Ruifeng said that intelligent breeding in the future, relying on artificial intelligence, big data and biotechnology, will be more efficient and accurate.

　　Of course, the powerful function of this pair of glasses depends on the breakthrough of basic research. "The reason why the introduction of low cadmium gene has achieved results for more than two years is because the functional sequence of low cadmium gene is very clear." According to Ye Rongjian, there are about 50,000 genes predicted in rice. At present, about 4,000 genes are cloned and their functions are clear. It may take many years for a gene to know its functions, and the road ahead is still very long.

　　"The laboratory not only undertakes the task of detection and analysis, but also explores the mystery of genes." Nie Dongming, the seed administrator, pushed open the heavy security door, and a germplasm resource bank with more than 100,000 rice materials was presented. Here, at the temperature of 4 degrees Celsius, the seeds enter a dormant state and can be safely stored for 5-mdash; Ten years.

　　Zhou Hua said that the germplasm resource bank is a treasure house for creating breeding materials. At that time, Academician Yuan Longping discovered the special material of wild rice sterile plant "Wild Abortion" in Sanya, and achieved the breakthrough of hybrid rice breeding.

　　R1607′ s breakthrough in rice blast resistance is also due to the germplasm resource bank. "At that time, we were making a breakthrough in the technology against rice blast. I heard that the Chinese Academy of Sciences discovered a gene with strong resistance, but breeding experts did not have this material at hand. We went to the germplasm resource library to search and found the original material. " Zheng Ruifeng introduced that this peasant variety was used to cross and backcross with indica rice varieties, and a series of materials containing rice blast resistance genes were bred.

　　"If things in nature are lost, you may not find them when you want to use them in the future. The importance of the germplasm resource bank is now more and more deeply understood. " Zheng Ruifeng said that it is a source protection when its value is not clear and the advantages of germplasm resources are not tapped.

　　Zhou Hua introduced that China Seed Group and Yazhouwan Seed Laboratory jointly issued a list for the first-class scientific research institutes and universities in China, and Industry-University-Research jointly integrated gene resources, and there were more than 10 topics in the field of rice alone. In addition to further cooperative research on low cadmium genes, there are also cooperation in herbicide resistance and rice false smut resistance. "The goal is to make excellent rice varieties full of treasures."

　　Seed production — — Hainan dongfang

　　One mu of seed production can be used for more than 100 mu of fields.

　　"Yanmei, throw me the seedling!" "Good, then!" Fu Yanmei didn’t lift her head. A bunch of tender rice seedlings came out and flew over eight or nine women who worked hard, drawing an arc over the paddy field and accurately "delivering" it to Zeng Yabei.

　　On February 3rd, gancheng town, Dongfang City, Hainan Province, after the Spring Festival, seed production and rice transplanting have been busy for more than a week. The villagers cooperated skillfully, transplanting rice in the field, and there were bursts of laughter from time to time.

　　Such busy and cheerful scenes often appear in the process of seed production. In the whole seed production process, the most attractive thing is heading and flowering, which is also called catching powder.

　　At the end of October last year, in this field, the reporter witnessed a scene of catching powder. The sky clears up, the temperature rises, the male parent and female parent materials in the rice field bloom and spit, and pale yellow flowers are dotted with light green ears of rice swaying gently in the breeze. A 40-meter-long rope hangs in an arc on the ear of rice. The two workers each held one end and walked quickly forward in parallel. Where the rope passed, the ears of rice touched, the stamens trembled, the pollen floated to the pistil of the female parent, and suddenly a pale yellow powder fog was stirred in the field.

　　Wang Shiming, general manager of Hainan Nongle Nanfan Technology Co., Ltd. said: "Breeding is to bring a bag of seeds and carry a bag of seeds back. Seed production is different. One acre of seed production can be used for more than 100 acres of fields. "

　　There are many seed production processes, so it is necessary to plant seeds in reverse order to let parents meet this flowering period. For example, it takes 100 days for the male parent of Quanyou 607 to plant and 80 days for the female parent, so the male parent should plant 20 days in advance; After that, we constantly observe the leaf period, analyze the flowering period, and sometimes adjust it through water and fertilizer to ensure that the flowering period meets.

　　"Artificial powder driving can improve the seed setting rate of hybrid rice." Wang Shiming introduced that many years ago, there were as many as 100,000 people in Hainan from Pingxiang City, Jiangxi Province. In recent years, the country has revitalized the seed industry, and Pingxiang has also introduced measures such as subsidies for large seed producers and subsidies for grain production. Encouraged by this, many Jiangxi farmers who have produced seeds in Hainan have returned to their hometowns for development.

　　"Raising seedlings, transplanting seedlings, heading and pollination, harvesting and drying seeds, selecting seeds and packaging, I can play when I am young." Wang Shiming has been following his parents to Hainan for more than 20 years. His skin is tanned and he speaks slowly. In 2022, Dongfang City, where he lives, was recognized as a national seed production county, with a million mu of fertile land in Thanksgiving Plain. "Winter seed production starts at the end of December every year, and the seeds are harvested in April and May of the following year, which is just the time for the middle and lower reaches of the Yangtze River."

　　Affected by rising land rent and labor costs, Hainan rice seed production has been moving westward, from Sanya to Ledong Li Autonomous County, and then to Dongfang City. "The average annual land circulation per mu in the East is 1,300 yuan, but it has already exceeded 3,500 yuan in Sanya." Wang Shiming said.

　　In the middle and late September of 2022, Wen Mincao, deputy manager of the production department of Zhongzhong Agricultural Science and Technology Company, received an urgent task. When the seed production area of Quanyou 607 Hainan suddenly increased from the original six or seven thousand mu to more than 20,000 mu, his head was buzzing. Where can he find the producer and production base?

　　The Chinese company implements the order system and gives plans to manufacturers and professional teams all over the country every year. However, the farming season in the mainland has passed in winter and it is difficult to produce seeds; Although Hainan can produce seeds, it is also the winter melon and vegetable season, with less open space, high land rent and early seed delivery time. At one time, it is a bit intense to "grab the base".

　　Thanks to Wang Shiming’s contacts in many ways, Wenmin Cao took only one week to reach an intention on 6,000 mu of land and finally breathed a sigh of relief. "Seed production counties support the integration of production, processing, warehousing, packaging and logistics. With favorable policies, we have signed a cooperation framework for the integration of production and supply chain with local manufacturers, which can be produced locally, packaged locally and sent to the market, and can be stored locally if they are not sold out."

　　All the efforts are worthwhile.

　　In the middle and lower reaches of the Yangtze River, farmers who have tasted the sweetness have long been thinking about good seeds. In Shilou Village, Wudian Town, Zaoyang City, Hubei Province, Chen Bangguo, a large grain grower, called Qiu Yunze, a seed dealer in Wudian Town, after planting winter wheat.

　　"Good seeds are in demand! When we tried to plant Quanyou 607, it was Laoqiu who came to sell it, and he guaranteed it, saying that it was not good to compensate my output. As a result, two or three hundred kilograms of rice were added to an acre of land. I am happy to invite Laoqiu to eat! " Chen Bangguo said.

　　"In the early stage, we will build a model field display, and invite large households to go to the scene to observe the harvest and yield measurement, so that more farmers can see the comparative advantages of varieties. In the later stage, collect information about high-yield farmers, make posters, and organize seedling meetings from seedling stage to heading stage to expand influence. " Speaking of the promotion experience of good seeds, Wang Hanyong, deputy sales manager of Hubei Branch of China National Seed Group, talked endlessly.

　　The field of hope, season after season, the story of a fine variety will be told constantly.

　　Planning for this issue: Yin Xinyu, Wu Yan and Cheng Juxin