Health codes are based on actual data and can be generated by citizens or people who have returned to work through online declaration and background audit. As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city. The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly.
Law of People's Republic of China (PRC) 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, the following emergency measures can be taken and announced after being approved by the people's government at the next higher level: (1) restricting or stopping performances in markets, theaters or other places where people gather; (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.
Article 45 In the event of an outbreak or epidemic of infectious diseases, the State Council has the right to urgently mobilize personnel or reserve materials and temporarily requisition houses, vehicles and related facilities and equipment throughout the country or across provinces, autonomous regions and municipalities directly under the Central Government.