According to Article 99 of People's Republic of China (PRC) Food Safety Law: prepackaged foods: refers to food prepackaged or made of packaging materials and containers. Include a predetermined amount of packaging and a predetermined amount of food made in package materials and containers and having uniform quality or volume label within a certain limit.

According to the regulations, the contents of energy, protein, fat, carbohydrate and sodium and their percentage in nutrient reference values (NRV) must be marked on the outer packaging label of prepackaged foods, and unmarked products will not be allowed to enter the market.

Prepackaged foods has two characteristics: first, it must be pre-packaged; Second, there should be a uniform quality or volume mark on the package.

In daily life, there are many kinds of prepackaged foods, such as liquor, milk powder, boxed yogurt and bagged rice.