legal analysis: necessary.

1. Health supervision departments regularly carry out special rectification work on the health certificates of employees in catering units and public places. An administrative penalty shall be imposed on those who work without a license and shall be ordered to make corrections within a time limit. Law enforcement personnel should adhere to the principle of combining education with punishment, serve in supervision, and patiently carry out publicity and education on health law-related content.

2. In order to ensure the consumers to exercise their supervision right, the health supervision department should require people engaged in catering, hairdressing, bath and other service industries to wear health certificates during their work.

3. Operators and service personnel should be clear about the importance of holding certificates, and take the initiative to participate in the annual health examination and health knowledge training.

legal basis: article 45 of the food safety law of the people's Republic of China shall establish and implement a 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 the work of contacting directly imported food. Food production and marketing personnel engaged in the work of contacting directly imported food shall have annual health examination and obtain health certificates before taking up their posts.