A supermarket is a large-scale comprehensive retail mall that deals in food, household necessities and food by customers' choice. It appeared in the 193s. First of all, from the grocery store, all kinds of foods are marked on the shelves in different categories for customers to choose by themselves, and then they go out to pay at one time. Supermarket, also known as supermarket, is the main form of commercial retail organization in many countries, especially in economically developed countries.

supermarkets are generally divided into hypermarkets, comprehensive supermarkets, standard supermarkets and convenience stores.

hypermarkets (one-stop shopping): the average single product can reach more than 2, pieces. For example, most stores such as Wal-Mart, RT Mart and Carrefour can be called hypermarkets. The general area is about 1 square meters or more; ?

comprehensive surpassing: a single product can reach about 12,-15, pieces. The general area is about 5-8 square meters;

exceeding the standard: the number of items is about 5,-8,, and the general area is about 3,-5, square meters;

convenience store (community store): if the number of items is about 2,-3,, the general convenience store will delete the area of fresh goods. Even if there are fresh goods, there will not be many, for example, meat and aquatic products will be reduced, with a general area of about 5-1, square meters.

The so-called chain is the type in which a retail enterprise is wholly-owned or holds most of the shares, while joining is the type in which the enterprise prints out the signboards, allowing some outsiders to join the team and do business with their own signboards. Enterprises generally charge a certain joining fee and provide certain technical guidance when appropriate.

to sum up, the industry category of supermarkets is: commercial retail industry.