Legal analysis: Zhengzhou is a low-risk area at present. People returning to China for the New Year in low-risk areas in China include college students, office workers and migrant workers. , all need negative proof of nucleic acid test within 7 days. If they can't provide negative results of nucleic acid test, the street will arrange 1 nucleic acid test for them for 14 days of community health management.

Legal basis: Article 17 of the Law of People's Republic of China (PRC) on the Prevention and Control of Infectious Diseases, the state establishes an infectious disease monitoring system.

The health administrative department of the State Council formulated the national infectious disease monitoring plan and scheme. The health administrative departments of the people's governments of provinces, autonomous regions and municipalities directly under the Central Government shall, according to the national infectious disease monitoring plans and plans, formulate the infectious disease monitoring plans and work plans in their respective administrative regions.

Disease prevention and control institutions at all levels monitor the occurrence and prevalence of infectious diseases and the factors affecting their occurrence and prevalence; Monitor infectious diseases that have occurred abroad, not yet occurred in China or newly occurred in China.