Taiyi shenshu

The others are Da Liu Ren and Qi Men Dun Jia.

One form of Taiyishenshu popularized over the centuries predicts personal fortunes.

Genghis Khan, founder of the Mongol Empire, referred to Taiyi at one point to decide whether or not his planned invasion of Japan would succeed.

When the Taiyi count indicated that invasion would prove unsuccessful, Khan canceled his plans.

Numerous examples appear in classical Chinese literature, especially in the dynastic histories.

A rendering of the position of the symbols and counts of No. 1 Yang Dun array for Tai Yi divination. The entire series consists of 72 Yang Dun and 72 Yin Dun arrays for Taiyi