We advocate balanced and reasonable diets, and to do so, we must have diverse foods. All foods in the world, except breast milk which is a whole nutritious food for infants in the first 6 months of life, cannot meet the need for nutrition. Because the required nutrients protein, fat, carbohydrates, inorganic salts, vitamins, dietary fiber, etc. are diverse, no food supply is complete, so it must be diverse food. There are specific recommendations for the types of food to be consumed daily Chinese Dietary Guidelines for the population, with 12 types per day and 25 types per week. To achieve food diversity, the table will be recommended accordingly, the lowest layer of the dietary pagoda of cereals and potatoes, mixed beans, 3 kinds of 1 day, 5 kinds of 1 week. Next fruits and vegetables, 4 kinds per day, 10 kinds per week, livestock, poultry, fish, eggs 3 kinds per day, 5 kinds per week. Milk, soybeans, nuts 2 kinds per day, 5 kinds per week. The total can reach 12 kinds per day and 25 kinds per week. It will be easier and more convenient to arrange according to the table. A balanced diet must be a food based on diverse cereals.