The overall concept of correspondence between man and nature is the guiding ideology of TCM health preservation. The human body is not only an organic whole, but also inextricably linked with the external environment. Nature is the foundation on which all things live and the source of human life. "Records of the Sui Dynasty" said: "Man is related to heaven and earth, and corresponds to the sun and the moon." Su Wen's theory of six Tibetan images says: "heaven eats people with five gases, and the earth eats people with five flavors." ..... harmony of qi, complementarity of body fluid and spirit. " This shows that human beings are born of yin and yang, and are closely connected with nature. Nature not only provides nutrition, moisture, air, sunshine, etc. To meet the needs of human metabolism, we must also adapt to various changes in nature. Whether it is the climate of the four seasons, the twilight in the morning and evening, the movement of the sun and the moon, or the geographical environment, it will directly or indirectly affect the human body and make the human body produce various physiological or pathological reactions accordingly. For example, "Lingshu Ben Zang" says: "The five internal organs are towering to connect with Yin and Yang, and the four seasons and five knots are also." It shows that the whole life process of human growth and aging is the physiological process of the rise and fall of the five zang-organs function, and the five zang-organs function of human body is in harmony with each other and with the changes of nature. Therefore, according to the theory of the correspondence between man and nature, people must master the changing laws of nature, take care of them according to the movement changes of nature, and keep a harmonious balance with the yin and yang of heaven and earth, so as to be beneficial to physical and mental health. "Lingshu itself" said: "The health of the wise must also be suitable for the four seasons of cold and heat, harmonious with emotions, and both rigid and soft. If there is, it will not be evil for a long time. " Su Wen's Four Qi Tunes the Spirit says: "Man's four seasons of Yin and Yang are the foundation of all things. Therefore, saints raise yang in spring and summer and yin in autumn and winter to follow their roots, so at the gate of growth, they rise and fall with everything. " People are required to adapt to the changes in nature and make appropriate adjustments in mental activities, daily routine and five flavors of diet. If there are changes in spring temperature, hot summer, cool autumn and cold winter all year round, everything will change in spring, summer, autumn and winter, and the operation of human qi and blood will also change accordingly. "Su Wenba's Theory of Shen Zheng" said: "When the weather is warm and the sun is shining, people's blood is moist and floating, so blood is easy to diarrhea and qi is easy to run; When the weather is cold and cloudy, people will clot and cry, and they will be depressed. " It shows that the weather in spring and summer is warm, the yang is dissipated, and the qi and blood activities tend to be exterior-interior, and the operation is relatively smooth; In autumn and winter, the climate is cold, the yang is collected, the qi and blood activities tend to be inward, and the operation is slow. Therefore, in the bright spring season, people's spirit is pleasant and their vitality is relatively strong; In cold winter and gloomy weather, people often feel depressed, depressed, or feel uncomfortable all over. According to this natural law, the theory of "nourishing yang in spring and summer, nourishing yin in autumn and winter" is put forward by TCM, which advocates that in the spring and summer when everything is flourishing, people should conform to the trend of releasing yang, get up early and go outdoors, stroll in fresh air, stretch their bodies and make yang more abundant. In autumn and winter, the climate turns cool, the atmosphere is vigorous, and Yin Qi converges. People must pay attention to cold and warmth, adjust their work and rest time appropriately, avoid the cold, and keep the yin essence hidden inside, so that Yang Qi can't be released. This principle of nourishing yin and yang according to the climate of the four seasons is the concrete embodiment of the principle of harmony between man and nature.