Taijitu Taijitu A taijitu () is a symbol or diagram ( "tú") in Chinese philosophy representing Taiji ( "tàijí" "great pole" or "supreme ultimate") representing both its monist ("wuji") and its dualist (yin and yang) aspects. Such a diagram was first introduced by Song Dynasty philosopher Zhou Dunyi (周敦頤 1017–1073) in his "Taijitu shuo" 太極圖說. The modern Taoist canon, compiled during the Ming era, has at least half a dozen variants of such "taijitu". The two most similar are the "Taiji Primal Heaven" (太極先天圖 "tàijí xiāntiān tú") and the "wuji" (無極圖 "wújí tú") diagrams, both of which have been extensively studied
Yin and yang and lower troughs between them, and this alternation of high and low points in the water will radiate outward until the movement dissipates and the pool is calm once more. Yin and yang thus are always opposite and equal qualities. Further, whenever one quality reaches its peak, it will naturally begin to transform into the opposite quality: for example, grain that reaches its full height in summer (fully yang) will produce seeds and die back in winter (fully yin) in an endless cycle. It is impossible to talk about yin or yang without some reference to the opposite, since yin