The certificate of the health certificate unit shall be issued by the personnel department of the company and stamped with the official seal of the company, and indicate the employee's name, ID number, job position, validity period and health certificate number. 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. Those who are engaged in the service industry must apply for a health certificate at the Center for Disease Control and Prevention.