Rice, also known as rice, is a food made from rice after cleaning, hulling, milling and finishing. Rice is the main food for people in most parts of China. Rice contains about 75% carbohydrate, 7% - 8% protein, 1.3% - 1.8% fat, and is rich in B vitamins. The carbohydrate in rice is mainly starch, and the protein contained in rice is mainly rice glutenin, followed by rice glutenin and globulin. The biological value and amino acid composition ratio of the protein are higher than those of wheat, barley, millet, corn and other cereal crops. The digestibility is 66.8% - 83.1%, and it is also one of the higher cereal proteins.