English: Variant of the Taijitu ("supreme ultimate diagram"). A number of similar such diagrams are known from the Ming-era Daoist canon. The origin of this particular design is unknown (but it likely predates the 18th century)
Literature:
Joseph A. Adler, Reconstructing the Confucian Dao: Zhu Xi's Appropriation of Zhou Dunyi, SUNY Press, 2014,
p. 154
Robinet, Isabelle (2008), "Taiji tu. Diagram of the Great Ultimate", in Pregadio, Fabrizio, The Encyclopedia of Taoism A−Z, Abingdon: Routledge,
p. 935
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