The health certificate is valid for one year and will be re-examined every year. A new health certificate cannot be exchanged for a new one. As long as the validity of the health certificate expires, you need to bring relevant information to re-apply, go to the health and epidemic prevention department, and then have a physical examination. Physical examination in general health and epidemic prevention stations is acceptable, with 2 photos of 1 inch. If there is no infectious disease, you can get a health certificate within 7 working days.
Legal basis: 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.
Article 87 The food safety supervision and administration department of the people's government at or above the county level shall conduct regular or irregular sampling inspection of food, and publish the inspection results in accordance with relevant regulations, and inspection shall not be exempted. When sampling inspection is carried out, sampling samples shall be purchased, and food inspection institutions conforming to the provisions of this Law shall be entrusted for inspection, and relevant expenses shall be paid; Shall not charge food producers and operators inspection fees and other fees.
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The above answer is only for the current information combined with my understanding of the law, please refer carefully!
If you still have questions about this issue, I suggest you sort out relevant information and communicate with professionals in detail.