1. Complain to the restaurant management. You can complain to the person in charge or manager of the restaurant and ask them to apply for a new health certificate or take measures to ensure the integrity and authenticity of the employee's health certificate.
2. Complain directly to the local food and drug supervision and administration department. Complaints can be made by telephone, mail or letter. When making a complaint, you should provide relevant information such as the specific situation, time, place and personnel involved, and leave your own contact information for the supervision department to investigate and verify.