You must eat more milk and bean products. Milk is rich in high-quality protein and vitamins, with high calcium content and high utilization rate. It is an excellent source of natural calcium. Studies have shown that calcium supplementation in children and adolescents can improve their bone density, thus delaying their age of osteoporosis. Beans are traditional foods in China, which are rich in protein, unsaturated fatty acids, calcium, vitamin B 1, vitamin B2, nicotine and so on. We should advocate the production and consumption of beans, especially soybeans and their products.