The amount of healthy sleep varies among different age groups, usually 6-8 hours for adults, 12-16 hours for infants, 10-12 hours for children, and about 6 hours for the elderly. Healthy sleep can eliminate fatigue, restore physical strength, protect the brain, restore energy, enhance immunity, delay aging and promote longevity. Healthy sleep requires maintaining a regular routine, going to bed and waking up on time, and it is best to go to bed before 11 p.m. every day, and to exercise appropriately during the day to maintain a comfortable sleep environment. Coffee, strong tea, cola, alcohol and smoking are forbidden before going to bed, so as not to lead to mental arousal and unable to sleep peacefully. In addition, the nap time should preferably not exceed half an hour. Long-term poor sleep quality will directly affect the quality of life and physical health, and even lead to increased incidence of hypertension, diabetes, cardiovascular and cerebrovascular diseases.