Nowadays, middle-aged and elderly people generally pay attention to health preservation, and they also have this condition and concept. Only young people occupy the capital of youth and squander it at will, destroying it and violating the laws of nature. You said 1 1 sleeping at night is nourishing the liver. He said it's still early, and the Internet has just started. You said the sunshine in the morning is a good time to sleep. He said that morning is a good time to sleep. Health care for young people is very simple. He is different from the health care of middle-aged and elderly people. Keep it if you don't squander it. Young people are better than old people. They don't lack anything, as long as you don't break the laws of nature, life and balanced nutrition. Now some young people have begun to accept the concept of health preservation, and practice it, avoiding bad living habits such as staying up late, smoking and drinking, paying attention to diet and living rules, and not singing against nature. Middle-aged people who are active in all walks of life need correct health care methods to guide health care and lay a solid foundation for their later years.