Rice is one of the main features of China people's daily diet, and it is also the staple food in southern China. Rice can be mixed, and it can supply almost all the nutrients needed by the whole body. Rice is flat and sweet; It has the effects of invigorating middle warmer, invigorating qi, invigorating spleen, nourishing stomach, nourishing essence, strengthening heart, harmonizing five internal organs, dredging blood vessels, hearing, improving eyesight, quenching thirst and diarrhea. Rice with embryo and aleurone layer contains 90% of the essential nutrition of human body, and all kinds of nutrition are very balanced, so it is the best staple food. The appearance of rice can be traced back to porridge. Because the requirement of controlling the amount of porridge water is lower than that of rice, the ancients in China slowly mastered the cooking effect of different amounts of water and developed fuller rice.