The food industry is developing rapidly and there are different kinds of snacks, of which buns are common in everyday life, while guan has always had a high reputation, and now both work and older children like guan. Currently, companies are engaged in product research and development, marketing and chaining, and there are now a number of chain shops, each with the same marketing programme, business model and brand image, giving customers a good sense of branding. Moreover, companies will have specialized technical research and development teams, new products will be developed every year, and tastes will be available to suit market demand, not only to support and upgrade the technology of new products for chain stores, and to allow the type of buns produced by chain stores to satisfy consumer preferences. There are now a wide variety of buns and special tastes, such as pork pies, beef pies, green mushrooms, etc., and porridges, spicy soup, etc., to meet the needs of customers, while...