On the forty-fifth day of winter solstice, the yang is slightly higher and the yin is slightly lower. "What is the relationship between Yin and Yang?"

The restriction of yin and yang, that is, the mutual inhibition and restraint of yin and yang, is mainly reflected in the process of mutual growth and decline of yin and yang.

For example, the reason why spring and summer are warm is because the rise of yang in spring and summer inhibits the chill and chill in autumn and winter; The reason why it is cold in autumn and winter is that the rise of Yin Qi in autumn and winter inhibits the warmth of spring and summer.

The theory of Yin-Yang and Five Elements is a simple dialectical materialist philosophy created by China ancients. Therefore, ancient physicians used the theory of Yin-Yang and Five Elements to explain various physiological and pathological phenomena of human body, and guided and summarized medical knowledge and clinical experience, and gradually formed a theoretical system of traditional Chinese medicine based on the theory of Yin-Yang and Five Elements. ?

Yin-yang theory is a theory that discusses the physiological function and pathological changes of human body according to the phenomena and laws of natural movement changes, so as to explain the functional activities, organizational structure and their relationship of human body. This theory had a far-reaching influence on later ancient philosophy. For example, China's astronomy, meteorology, chemistry, mathematics, music and medicine were all developed with the help of the theory of Yin-Yang and Five Elements.