Taiji Tun

"One of the best-known and most influential Neo-Confucian (Dao Xue, Study of the Dao) philosophers was Zhou Dun-Yi (1017-73 CE), creator of the famous tai chi diagram (Taiji tu, the yin-yang symbol) and its accompanying commentary, which was based on his study of the "appendices" of the Yi Jing."
- Andy James, The Spiritual Legacy of Shaolin Temple, p. 84