Huangdi Neijing is divided into Lingshu and Suwen, which is the earliest medical classics in China and one of the four classic works of traditional medicine.

The way of keeping in good health in Huangdi Neijing is the theoretical basis of longevity in traditional Chinese medicine, and it is also the theory of studying health and longevity. This paper summarizes the experience of ancient human health and longevity since 2000, and highly summarizes the way of health preservation. For example, it is pointed out in Suowen's "On Ancient Naivety" that "the ancient people, those who know it, use the method of yin and yang, count the numbers, eat moderately, live moderately, and do not move rashly, so they can be in harmony with God and die.