We have optimized risk area management, improved nucleic acid screening programs, and improved the efficiency of epidemiological investigations... For several days, all parts of the country have adjusted and optimized prevention and control measures in accordance with the changing situation of the epidemic situation and the actual situation in many places, and constantly improved scientific and accurate prevention and control capabilities. On November 30, Haizhu, Tianhe, Panyu, Liwan and other districts in Guangzhou successively issued notices announcing the removal of all temporary control areas for epidemic prevention and control. In addition to the designated high-risk area units and buildings, other areas in Guangzhou are managed as low-risk areas or normalized prevention and control measures. Zhang Yi, Deputy Director of Guangzhou Municipal Health Commission, said at the press conference held that in order to comprehensively, accurately and completely implement the ninth version of the prevention and control plan and the requirements of the twenty optimization measures, each district is further optimizing the prevention and control measures. In principle, the living place of the infected person and the working and activity areas with frequent activities and high risk of epidemic transmission are designated as high-risk areas. High risk areas are generally designated by units and buildings, and shall not be expanded at will. Recently, Kunming and other places also released the announcement of lifting the temporary control area. All localities actively implement the requirements of "quick closure and quick release, and complete resolution" in the closure and control management, and strive to reduce the impact of the epidemic on economic and social development and the production and life of the people. The Office of the General Headquarters for Epidemic Prevention and Control of Shijiazhuang issued a notice that since December 1, Qiaoxi District, Chang'an District, Yuhua District, Xinhua District, High tech Zone, and Cyclic Chemical Industry Park have implemented differentiated prevention and control by zones and levels, and orderly restored production and living order. Chongqing held a press conference on epidemic prevention and control on November 30, which said that the central urban area of Chongqing and Liangping District would implement differentiated prevention and control measures according to the development situation of the epidemic from each district in accordance with the idea of "zoning, point to area, and gradual liberalization". Other districts and counties gradually implement normalized prevention and control under the premise of controllable risks. On November 30, Guangzhou, Chongqing, Shenzhen and other places further optimized the nucleic acid testing requirements, emphasizing the nucleic acid testing for risk posts and key personnel, and not expanding the scope of nucleic acid testing. Generally, the whole staff's nucleic acid testing is not carried out according to administrative regions. Chongqing emphasized that "no repeated detection and no code detection", and set up normal nucleic acid detection points to meet the needs of people for nucleic acid detection. On the basis of scientific evaluation, targeted "accurate exemption" for some groups can not only reduce communication risks, but also effectively save resources. Following the adjustment of nucleic acid detection scheme for special populations in Guangzhou, Shenyang, Taiyuan, Beijing and other places also launched relevant measures. Xu Hejian, spokesman of the Beijing Municipal Government, said that from November 30, 2022, if there is no need to go out, the city's long-term elderly at home, home office and school workers, infants and young children and other people without social activities can not participate in community nucleic acid screening. Chaoyang District, Beijing, in view of the fact that most of the new cases are concentrated in the urban-rural fringe and rural areas, continues to optimize the nucleic acid detection process of "collection, delivery, inspection, reporting and verification", strengthen the management of the whole process, speed up and improve efficiency, and give priority to the "ten mixed and one" mixed positive detection. Accurately carry out epidemiological investigation on close connection and time space concomitance. There have been various judgments in different regions, and different judgments have been adopted