Yin and Yang:As Described by a German Sinologist in the Early Twentieth CenturyOA

1 Introduction Yin-yang(阴阳)theory is an important concept which has influenced China spanning over two thousand years,especially in the practice of traditional Chinese medicine(TCM).Yin-yang is now depicted as the well-known symbol of Chinese wisdom.The theory basically refers to the interdependent unity of opposites between two fundamental attributes.