Zhou Dunyi
A taijitu () is a symbol or diagram ( "tú") in Chinese philosophy representing Taiji ( "tàijí" "great pole" or "supreme ultimate") in 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.