Yin Yang Eyes
The Old Tai Chi Diagram has no fish eyes like today.
Fu Xi discovered the secret of Eight Trigrams (ba-Gua). Combing two set of Trigrams become 64 Hexagrams, which can forecast the result of an event according to the circumstance. Just a few of intelligent Chinese mastered 64 hexagrams during Shang Dynasty (1751 BC) and Chou Dynasty. They used 64 hexagrams to conquer China.