First of all, health preservation is to promote health and achieve the purpose of preventing diseases and prolonging life. If you value your health, please read on. The purpose of health preservation is to prolong life and be healthy and disease-free. People should keep in good health as long as they have a breath, and the requirements of keeping in good health vary according to their own different situations. According to [[Neijing]], the normal life span of the world should reach 100 years, which is basically consistent with the modern understanding of human life span, but so far only a few longevity stars can achieve it. At present, the country with the longest life expectancy in the world can't be over 80 years old, which shows that health preservation is indeed a major issue facing all mankind. For young people, health depends mainly on themselves, but they also need the guidance and care of their parents. This period is characterized by rapid growth, substantial increase in intelligence and physical strength, and gradual maturity of fertility, which is the most significant period of mental and physical changes. Mentally, be kind to him, be loving, and guide him to reason and distinguish between good and evil. Poor teaching will lead to his withdrawn personality, strange behavior and even harm to society. Physically, advocate omnivory, self-care, diligent hands and feet, fully ensure the nutritional needs of its growth and development, and avoid stunting and dysplasia; In particular, we should pay attention to making them participate in housework and social welfare activities within their power, be enthusiastic about public welfare, be honest, and avoid the habit of getting what they want because of excessive indulgence and never taking care of others. Therefore, health care is very important to us. "Young is capital, and health care will be considered when you are old!" "This view is wrong.