The Yin Yang Symbol is called Tai Chi Diagram in China. This is because the Tai Chi philosophy is widely spread by I-Ching and Taoism. There is no answer for who drew the first Tai Chi diagram. One says Tai-Chi is all from Fu-Xi, who invested I-Ching before Chinese written history. Yin Yang S-shape was found on the pottery in Shiah Dynasty (2205 B.C.) and Chou (1122 B.C.) Dynasty. Others say it came from Han (104 B.C.) Dynasty, Tan Dynasty or Sung Dynasty. The following is the first Tai Chi diagram found and is called Old Tai-Chi Diagram.