Please report to the local community or hotel or call the local epidemic prevention and control hotline, and cooperate with the local government to implement health management measures such as medical observation and nucleic acid detection. Personnel entering South China from high-risk areas should strictly implement centralized medical observation measures 14 days, and those entering South China from middle-risk areas should implement home medical observation measures 14 days, and carry out nucleic acid detection on 1 day and 14 days respectively. Family health monitoring was carried out for 14 days in other low-risk areas in the county where the high school risk area is located. Nucleic acid detection was carried out in high-risk areas on 1, 3, 7 and 14 days, and in medium-risk areas on 1, 3 and 14 days. People in other low-risk areas in the prefecture-level city where the high school risk area is located will receive 14 days of self-health monitoring and take nucleic acid detection measures twice within 3 days. People who have been in the south for more than 14 days should be tested for nucleic acid immediately. People entering the south from high-risk cities and land border port cities hold negative 48-hour nucleic acid test certificates. For the start time of health management, please refer to the List of Health Management Requirements for People Entering High and Medium Risk Areas in South China.