QS is a symbol of food market access, which consists of the English prefix QS of "Quality Safety" and the Chinese characters of "quality safety". The main color of the logo is blue, the letters "Q" and "Quality and Safety" are blue, and the letter "S" is white.

since 21, the market access system for food quality and safety has been first implemented in five categories of food: rice, flour, oil, soy sauce and vinegar. From May 1, 23, any food in five categories that has not obtained the Food Production License and has not been printed (affixed) with the QS mark shall not be sold out of the factory. In the second half of 23, it expanded to 1 kinds of food, such as meat products, dairy products, beverages, condiments (sugar, monosodium glutamate), instant noodles, biscuits, canned food, frozen drinks, quick-frozen rice-flour food and puffed food. In the near future, the food quality and safety market access system will be implemented for all foods including the remaining 13 categories of foods.

when purchasing food that has been subject to the market access system for food quality and safety, consumers should purchase food that has been printed (affixed) with QS mark.