Legal basis: People's Republic of China (PRC) Law on the Prevention and Control of Infectious Diseases.
Article 42 In the event of an outbreak or epidemic of infectious diseases, the local people's governments at or above the county level shall immediately organize forces to carry out prevention and control in accordance with the prevention and control plan and cut off the transmission route of infectious diseases. When necessary, it shall be reported to the people's government at the next higher level for decision, and the following emergency measures may be taken and announced:
(1) Restrict or stop fairs, theatrical performances or other crowd gathering activities;
(2) suspension of work, business or classes;
(three) closed or sealed public drinking water sources, food and related items contaminated by infectious disease pathogens;
(4) controlling or culling wild animals, domestic animals and poultry infected with the epidemic;
(five) closed places that may cause the spread of infectious diseases.
When the people's government at a higher level receives the report of the people's government at a lower level on taking the emergency measures listed in the preceding paragraph, it shall make a decision immediately.
The lifting of emergency measures shall be decided and announced by the original decision-making organ.
Article 43 When Class A and Class B infectious diseases break out and become epidemic, the local people's governments at or above the county level may, upon the decision of the people's government at the next higher level, declare part or all of their administrative areas as epidemic areas; The State Council can decide and publish epidemic areas across provinces, autonomous regions and municipalities directly under the Central Government. The local people's governments at or above the county level in the epidemic area may take emergency measures as stipulated in Article 42 of this Law, and may carry out health quarantine on people, materials and means of transport entering or leaving the epidemic area.
The people's governments of provinces, autonomous regions and municipalities directly under the Central Government may decide to block the epidemic areas of Class A infectious diseases within their respective administrative areas; However, it is up to the State Council to block epidemic areas in large and medium-sized cities or across provinces, autonomous regions and municipalities directly under the Central Government, and to block trunk traffic or close borders.
The lifting of the blockade of epidemic areas shall be decided and announced by the original decision-making organ.