The staple foods of China people are: 1. fish. Its amino acid composition is similar to that of meat, and it is also a high-quality protein food. Its muscle fiber is thin and short, and its meat is tender and soft, which is easier to digest and absorb than meat. Fish oil is rich in vitamin A, vitamin D and unsaturated fatty acids, and contains more inorganic salts such as phosphorus and potassium, and contains copper. 2. eggs. The nutritional components of poultry eggs are almost the same, and they are rich in protein, the best natural food. Eggs contain less calcium than milk, but far more iron than milk. Egg yolk is rich in fat, milky and easy to digest and absorb; It contains a lot of phospholipids, cholesterol and inorganic salts, as well as vitamins A, D, Gen and B2. 3. Milk. The nutrients contained are relatively complete and easy to digest and absorb, and the most common consumer is milk. Protein in milk contains essential amino acids, essential fatty acids, lecithin, vitamin A, vitamin D, vitamin B2, inorganic salts (calcium, phosphorus and potassium) and trace elements (zinc, iodine and silicon). Among them, calcium is not only rich in content, but also easy to absorb, which is the first choice for children and the elderly. 4. Cooking oil. It can be divided into animal fat (lard, butter, butter, etc.) and plant fat (soybean oil, peanut oil, vegetable oil, tea oil, cottonseed oil, sesame oil, etc.), which is pure fat. Edible oil can supply abundant heat energy to human body, prolong the time of food staying in stomach, and thus produce satiety.