QS is the English abbreviation of food "Quality Safety" (QualitySafety). Products with the QS mark mean that they have been approved by the state. All food production companies must undergo mandatory inspections, pass the minimum inspection, and The food packaging in the sales unit must be marked with the food production license number and printed with the food quality and safety market access mark ("QS" mark) before it can be sold out of the factory. If there is no food quality and safety market access mark, it shall not be sold out of the factory. Since January 1, 2004, my country has first implemented a food quality and safety market access system in the five food industries of rice, edible vegetable oil, wheat flour, soy sauce and vinegar.