In the past three years, China has persisted in taking small steps to fight against the epidemic, optimized and adjusted the epidemic prevention and control measures according to the situation, the situation, and the facts, and has successively issued the 9th version of the prevention and control plan and the latest 20 optimization measures. Each version of the prevention and control plan is based on the incubation period, transmissibility, pathogenicity and other pathogenic and epidemiological changes of COVID-19, as well as the latest epidemic situation at home and abroad. On the basis of summing up the experience and lessons of previous local epidemic prevention and control work, combined with China's prevention and control strategies and objectives, the wisdom of experts in various fields of prevention and control policy research is gathered. The implementation of the ninth version of the prevention and control plan and the twenty optimization measures aims to better adapt to the new situation of epidemic prevention and control and the new characteristics of COVID-19 variation, further improve the scientificity and accuracy of epidemic prevention and control, control the epidemic in the shortest possible time at a lower cost, balance the relationship between epidemic prevention and control and economic and social development, and protect people's life safety and health to the greatest extent, To minimize the impact of the epidemic on economic and social development is not to relax the prevention and control of the epidemic, nor to open up and "lie down". Practice is the most persuasive. The current ninth version of the prevention and control plan, mainly aimed at Omikjon, has played an important role in dealing with the epidemic caused by various Omikjon variants since its release at the end of June this year. Practice has fully proved that the ninth version of the prevention and control plan has withstood the test of time and is scientific and effective. Twenty optimization measures are the optimization and improvement of some measures in the ninth version of the prevention and control plan. In addition to the twenty optimization measures, other measures are still implemented in accordance with the ninth version of the prevention and control plan. We must fully realize that both the ninth version of the prevention and control plan and the twenty optimization measures are indispensable. The ninth version of the prevention and control plan is the premise of the twenty optimization measures, and the twenty optimization measures are important means to improve the scientific and accurate nature of prevention and control. We must not relax strict prevention and control because of the twenty optimization measures, The 20 optimization measures should not be "added layer by layer", "cut across the board" or simplified because of strict prevention and control. Only by combining reality, adhering to the ninth version of the prevention and control plan, and implementing 20 optimization measures, can we better implement the requirements of "epidemic prevention, economic stability, and development security", and achieve the maximum prevention and control effect at the minimum cost. Adhering to the ninth version of the prevention and control plan and implementing 20 optimization measures, the requirements for epidemic prevention and control have not become lower, but higher. We will not waver or deviate from the pattern. We will take more resolute and decisive measures to tackle the problem and stop the spread of the epidemic as soon as possible, based on prevention, early and fast. It is necessary to fully, accurately and comprehensively understand and grasp the current epidemic prevention and control policies, carry out prevention and control more scientifically, more standardized, faster and more effectively, and control the key risks that should be controlled