Raw flour is starch used to thicken and hang pulp. Raw flour is a term that often appears in recipes, which is mostly used for thickening, hanging pulp and making. The raw flour used in China, Chinese mainland and Taiwan Province provinces is potato flour, while the raw flour used in China and Hongkong refers to windmill super raw flour (potato starch) and chestnut flour (corn starch) imported from Europe. Raw flour can change the taste of food, make the taste of food more smooth and tender, and have high nutritional value. Usually, people can absorb protein and a lot of carbohydrates, as well as a variety of amino acids and vitamins beneficial to the human body, which can promote human metabolism and improve human physique. The main function of raw flour is to change the color and taste of dishes. Usually when people cook, when they are about to mature, they will pour the prepared raw noodle juice into the pot.