The imbalance of yin and yang is the basic pathogenesis of many a disease. Therefore, regulating relative excess or insufficiency of yin and yang, remedying defects to rectify abuses and restoring relative balance of yin and yang are one of the basic principles in clinical treatment. To restore their balance yin and yang are usually regulated by means of removing the relative excess or invigorating the relative deficiency. Since Yin and yang are the general guideline of differentiation of syndromes, all pathological changes may be summarized as the imbalance of yin and yang.

Besides, regulating zangfu's functions and qi-blood relationship are also two important therapeutic principles. Space lacks for a detailed description of it.

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