2. The "health certificate" is mainly used to prove that novel coronavirus is not infected at present through the physical condition, residence history and contact history within/0/4 days during the COVID-19 epidemic.
3. "Health Certificate" is the abbreviation of "Preventive Health Examination Certificate for Employees", and it is a necessary post certificate for production and operation personnel engaged in food, medicine and other industries as stipulated by laws and regulations. This is a document required by laws and regulations.