Commodity supply mainly comes from supermarkets, shopping malls, restaurants and other businesses selling food. When these merchants sell food, some foods may not be sold in time due to various reasons (such as out of season, expiration, inventory backlog, etc.). ), these foods will be regarded as temporary food. In order to reduce waste and loss, these businesses usually sell these foods in the form of low prices or discounts, so as to deal with the inventory as soon as possible.