TCM believes that man lives amidst the universe and his vital activities are inevitably influenced by the natural laws of material movement. Therefore, all the activities of the human body inevitably have formed close patterns with nature. The relationship between vital activities of the human body and nature as well as society should be harmonious and orderly. Otherwise, it is not good for health. This is the thought of "man's relevant adaptation to nature" and "unity of physique and spirit. "Accordingly, special emphasis is placed on the harmony between man and natural and social environments. More information, please read TCM Theory of Prevention.