Legal basis: Article 10 of the Regulations on Hygiene Management in Public Places * * * Operators of public places shall organize employees to have an annual health check-up, and employees shall not take up their posts until they have obtained valid health certificates. Persons suffering from digestive tract infectious diseases such as dysentery, typhoid fever, viral hepatitis A and viral hepatitis E, as well as persons suffering from active pulmonary tuberculosis, suppurative or exudative skin diseases, shall not engage in the work of directly serving customers before being cured.