Pay attention to the balance of diet, "five grains for nourishment, five fruits for help, five animals for benefit and five vegetables for supplement". The "five grains" are mainly carbohydrates, followed by protein, with low fat content. The ancients regarded beans as grains, which was in line with the modern nutritional point of view, because this kind of grain in protein lacked lysine and this kind of beans in protein lacked methionine. Eating cereals and beans together can complement protein. There are different opinions about "five grains" in the history of China. One statement refers to millet, millet, rice, wheat and rice, which can be found in the ancient book Zhou Li's Prescription. Another way of saying it refers to hemp, millet, millet, wheat and beans, which is found in the ancient book Huai Nan Zi. At that time, people regarded hemp as food, so they classified hemp as food; Later, marijuana was mainly woven from fibers, so it was not classified as edible. The gradually formed custom of "five grains" refers to five kinds of food crops: rice, wheat, millet, millet and rice. Millet refers to corn, including yellow rice, millet refers to millet, and glutinous rice refers to beans. At present, "five grains" have generally referred to various staple foods, generally referred to as grain crops, or "five grains", including cereals (such as rice, wheat, corn, etc. ), beans (such as soybeans, broad beans, peas, red beans, etc. ), potatoes (such as sweet potatoes, potatoes) and other miscellaneous grains. "Five livestock" refers to animal food such as livestock, poultry, fish, eggs and milk. Meat food is rich in amino acids, which can make up for the shortage of protein. "Five dishes" refers to all kinds of vegetables, which can nourish the human body, enrich the dirty qi and make all kinds of nutrition in the body more perfect and rich. There are many kinds of vegetables. Roots, stems, leaves, flowers, melons and fruits are all edible. They are rich in carotene, vitamin C and B vitamins, and are also the main source of dietary fiber.