Legal analysis: People returning from stone to stone in high-risk areas will be subjected to centralized isolation medical observation for 14 days. In the middle-risk area, people returning from stone to stone should be monitored at home for 14 days, which should meet the requirements of home isolation, and those who can't meet the requirements should be observed in centralized isolation medicine for 14 days. People from low-risk areas in cities where high-risk areas are located need to hold negative certificates of nucleic acid detection within 48 hours. If there is no negative certificate of nucleic acid detection, they need to carry out 1 nucleic acid detection.

Legal basis: Article 42 of the Law of the People's Republic of China on the Prevention and Control of Infectious Diseases, when an infectious disease breaks out and is prevalent, the local people's government at or above the county level shall immediately organize forces to prevent and control it according to the prevention and control plan, cut off the transmission route of the infectious disease, and, if necessary, report to the people's government at the next higher level and take the following emergency measures and make a public announcement: (1) restrict or stop fairs, theater performances or other crowd gathering activities; (2) Suspension of work, business or classes; (three) closed or sealed by infectious disease pathogens contaminated public drinking water sources, food and related items; (4) controlling or culling infected wild animals, domestic animals and poultry; (five) closed places that may cause the spread of infectious diseases.