There are two kinds of health certificates: one is public health certificate. The other is a food health certificate, which is needed by people in the catering industry. The health certificate is valid for one year, and it needs to be re-applied after the expiration.
For example:
There are two kinds of hotel waiter's certificates: one is public health certificate; The second is the food hygiene certificate. Depending on your position in the hotel, the receptionist and security guard of the hotel are all public health certificates, which are related to catering. For example, waiters and chefs who directly serve customers must apply for food health certificates.