The purpose of health preservation is to prolong life and be healthy without disease. People should keep in good health as long as they have breath, and the requirements of keeping in good health vary according to their 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 only a few longevity stars can achieve it so far. Nowadays, the country with the longest average 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 preservation mainly depends on themselves, but it also needs the guidance and care of parents. This period is characterized by rapid growth, great increase in intelligence and physical strength, and gradual maturity of fertility, which is the most remarkable period of mental and physical changes. In spirit, we should be kind and caring to him, and guide him to be reasonable and distinguish between good and evil. Failure to teach will lead to his withdrawn personality, bizarre behavior and even harm to society. Physically, it advocates omnivorous food, self-care, diligent hands and feet, fully ensuring the nutritional needs of its growth and development, and avoiding stunting and dysplasia; In particular, we should pay attention to making them take part in housework and social welfare activities within their power, be eager for public interests and be righteous, and avoid the habit of getting what they want because of overindulgence and never taking care of others.
Therefore, health care is very important for us. "Youth is the capital, and health care will be considered when you are old!" " This view is wrong.