Tai Chi produces Yin and Yang, then develops four phenomenon, eight trigrams and 64 hexagrams. This is how Tai Chi connecting to I-Ching. Fu Xi brought this philosophy to people. His philosophy prevails for thousand of years.
Fu Xi is considered the originator of the I-Ching.
I-Ching is related to Tai-Chi philosophy.
Fu Xi is the investor of Eight Trigrams (Ba-Gua) of the I-Ching.
Eight Trigrams are developed into 64 Hexagrams,
which are widely applied on predication.