Healthy diet is to pay attention to nutrition with a balanced diet. Nutritional intake according to our food pyramid ratio, food balance according to the “Yellow Emperor’s Classic of Internal Medicine” that is, “five grains for nourishment, five fruits for help, five animals for the benefit, five dishes for the full”. The “five grains” contain nutrients mainly carbohydrates, followed by plant protein, fat content is not high. The ancients took beans as the five grains is in line with the modern view of nutrition, because cereal protein lacks lysine, bean protein lacks methionine, cereals, beans together, can play a protein complementary role. ”Five fruits” refers to a variety of fresh, dried and hard fruits such as peaches, pears, apricots, plums, dates and chestnuts. They are rich in vitamins, trace elements and dietary fiber, as well as part of the plant protein. The “five fruits” try to eat raw, in order to ensure that the vitamins in the nutrients are not damaged by cooking. Fresh fruit processed into dried fruit, easy to transport and storage, although the loss of water-soluble vitamins, but the protein and carbohydrates increased due to dehydration. Hard fruits such as peanuts, walnuts, melon seeds, almonds, chestnuts, containing protein similar to beans, can make up for the lack of cereal protein. The “five animals” refers to animal food such as livestock, poultry, fish, eggs and milk. Meat food is rich in amino acids, can make up for the lack of plant protein. ”Five vegetables” refers to all kinds of vegetables, can nourish the human body, enrich the dirty qi, so that the body of various nutrients more perfect, more full. There are many kinds of vegetables, roots, stems, leaves, flowers, melons and fruits are edible. They are rich in carotene, vitamin C and B vitamins, and are also the main source of dietary fiber. Balanced nutritional ratio – Cross and quarter method: Draw a cross on the center of a dinner plate. Divide the plate into four parts, and the four corners are “five grains”, “five fruits”, “five animals” and “five vegetables”, respectively. Simply put: staple food, fruit, protein and vegetables. Diet diversification, daily intake of food diversification, can reach more than 24 kinds of the best. Include natural condiments, ingredients, etc. Freshness: eat less deeply processed and long-term storage food, pickled food. Moderate: determine daily caloric intake according to the grading of physical work and exercise energy consumption.