The methods of health preservation mainly include the following points: First, keep a peaceful mind. In Huangdi Neijing, it is said that to be calm is to pay attention to regulating emotions and not to be too nervous, anxious and depressed; Second, pay attention to diet, regularly quantify three meals, don't overeat, don't eat too spicy, irritating, greasy and cold food, don't eat some fried and barbecue foods at the same time, and the diet structure should be reasonable; Third, proper physical exercise, life lies in exercise, and proper exercise can increase the blood circulation of the whole body and enhance physical fitness; Fourth, to ensure adequate sleep, generally speaking, meridian sleep is very important, that is, around noon 1 and at night 1. People must be asleep at this time.