The raw flour in Chinese food is starch, stir-fried vegetables for thickening, sizing, etc., there are a variety of, such as sweet potato starch, Sichuan cuisine in the use of water bean powder, and corn starch, etc. Raw flour is starch, there can be a variety of, generally referred to as corn starch thickening of academic concepts: with the help of starch in the case of heat pasteurization, has the characteristics of water absorption, adherence, and smooth and clean. When the dishes are close to maturity, the adjusted powder juice is drizzled into the pot to make the marinade thick and thick and increase the adhesion of the marinade to the raw materials, thus increasing the powder and concentration of the dish soup and improving the color and flavor of the dishes. Chestnut flour belongs to corn starch, starch is a carbohydrate formed by plants through photosynthesis. It is a polysaccharide composed of a single type of sugar unit and relies on natural synthesis by the plant body. Starch is found in large quantities in the seeds, tubers and roots of plants. Varieties of starch include corn, rice, wheat, potato, sweet potato, cassava starch, etc. In addition to the above major varieties, there are also acorn, plantain taro, kudzu, and shouwu starch. Raw flour (i.e., tai bai powder), also known as bean flour bean ling powder, is made from fava beans or rhombus. Raw flour has a wide range of uses, can be used as a seasoning for stir-fried vegetables, can also be made cold noodles, can also be used to spread pancakes. It is mainly used in the processing of meat raw materials, such as sizing, hook owe. Raw flour does not exclusively refer to any one type of starch, it is a term that often appears in mainland and Hong Kong recipes, and is mostly used for hooking. In mainland China and Hong Kong, cornstarch is used as the raw meal, while in Taiwan, tai pai flour is used as the usual powder. In Chinese cooking, cornstarch is not only used to make the food smooth and moist, but also used as one of the marinades to soften the meat.