If you lose your health certificate, you can reissue it. The health certificate is valid for one year. If it is lost within one year, it shall apply to the physical examination center of the local epidemic prevention station for a replacement. If the time is too long, you need to have a new physical examination. The health certificate you need to apply for is different, and the cost is different. Health certificate refers to the proof of preventive health examination, which proves that the examinee has the health quality to engage in the prescribed business. Health certificate mainly involves six diseases in five industries, which largely protects the health of employees and clients. Health certificate refers to the pre-post, pre-post and age-appropriate health examination for personnel engaged in food and drinking water production and management, personnel directly engaged in cosmetics production, personnel who directly serve customers in public places, hazardous workers, radiation workers and school students according to the provisions of national health laws and regulations.
People's Republic of China (PRC) Food Safety Law
Article 45
Food producers and business operators shall establish and implement the health management system for employees. Persons suffering from diseases that hinder food safety as stipulated by the administrative department of health of the State Council shall not engage in direct contact with imported food. Food production and marketing personnel engaged in direct contact with imported food shall undergo annual health examination and obtain health certificates before taking up their posts.