It's best not to eat in the morning to get a health certificate. You can't get a health certificate if you eat it, because you can draw blood on an empty stomach in the morning to check your liver function, and a cold will also affect your liver function. It's best to wait until the cold is over before taking a blood test.
Second, the legal basis
According to the Food Safety Law, Regulations on Hygiene Management in Public Places and other laws and regulations, relevant personnel engaged in food production and management, public service, professional production of cosmetics, disposable medical and health care products, toxic and hazardous and radioactive operations, and child care institutions must hold health certificates. The main diseases involved in health examination are dysentery, typhoid fever, active tuberculosis, dermatosis (infectious) and other infectious diseases. If you find these diseases, don't engage in hairdressing and beauty, direct contact with imported food, public toilets and other work that directly serves customers. You can only work if you are cured. On June 1 day, 2009, China formally implemented the new Food Safety Law, and on July 20th, China issued the implementing regulations to allow hepatitis B virus carriers to engage in the food industry. Therefore, hepatitis B virus carriers can also legally apply for health certificates. Health certificate examination items: routine medical examination and surgical examination; Liver function (alt); Stool culture (dysentery, typhoid Bacillus), chest fluoroscopy.
It should be noted that people suffering from dysentery (amebic dysentery, bacillary dysentery), typhoid fever, viral hepatitis, active pulmonary tuberculosis, purulent skin diseases, exudative skin diseases and infectious skin diseases, severe trachoma, acute hemorrhagic conjunctivitis and other diseases that hinder public health cannot obtain health certificates.