China's classic medical work Huangdi Neijing first put forward the concept of "correspondence between man and nature". It is pointed out that people live in nature, which is also one of the components of nature, and their physiological activities are constantly adjusted and adapted by the influence of nature. The changes of cold, hot and cool all the year round are formed by the ups and downs of yin and yang in a year. Because of the changes of yin and yang in the four seasons, there are biological development laws of Tibet in spring, summer, autumn and winter.

Complex changes in nature will inevitably affect all aspects of the human body. According to the theory of traditional Chinese medicine, there are three Yin San yang, six qi and five elements in the sky, and three Yin San yang, six qi and five elements in the human body. The change of natural climate directly affects the movements of Yin and Yang, Six Qi and Five Elements, while the physiological activities and pathological changes of human body depend on the coordination of Six Meridians and Five Zang Qi.

The movement of yin-yang and five elements in nature corresponds to the movement of qi in the five internal organs and six meridians of the human body. Man and nature are an inseparable whole, and human life activities are closely related to nature. It can be seen that people must adapt to various changes in nature. Only in this way can we conform to nature, achieve the unity of human body and natural environment and maintain health. This is the basic principle that health care should follow.

Under the guidance of the corresponding holistic view of harmony between man and nature, the traditional health preserving theory of the motherland holds that all life activities of the human body must conform to the objective laws of the ebb and flow of yin and yang at four seasons and the transformation and substitution of twenty-four solar terms.

Throughout the year, it is sunny in spring and summer and cloudy in autumn and winter. Natural solar terms are also spring, summer, autumn harvest and winter storage that change with the climate change. Therefore, in spring, people should naturally maintain the yang; Yin Qi should also be maintained in autumn and winter, so there is a saying that "Yang is nourished in spring and summer, and Yin is nourished in autumn and winter". This requires people to make appropriate adjustments to their spiritual activities, daily routine and diet according to the changes of the four seasons. In terms of work and rest time, we should also conform to the changes of the four seasons, so as to achieve "regular daily life", "lying late and getting up early" in spring and summer, "lying early and getting up early" in autumn and "lying early and getting up late" in winter. In diet, intake should be more regular. Hunger, satiety or partial eclipse will harm the viscera and affect health.