Zhouyi copula: "Therefore, it is easy to have Tai Chi, and it is to give birth to two instruments, two instruments give birth to four images, and four images give birth to gossip, which will determine good and bad luck, and good and bad luck will give birth to great cause."

Taiji, that is, Taiyi, refers to the chaotic state of heaven and earth, and the two instruments refer to heaven and earth, here referring to yin and yang. The four images refer to Shaoyin, Shaoyang, Laoyin and Lao Yang, which are eight, seven, six and nine in divination, and the four seasons are spring, summer, autumn and winter. The Qinglong Creek you mentioned upstairs should be Four Holy Beasts, which is a synthesis of the astronomical expressions of the four elephants. Bagua, Gan, Kun, Zhen, Xun, Kan, Li, Gen and Right. And heavy gossip is sixty-four hexagrams.

As for how it changed, Shang's annotations to Zhouyi can prove that:

"The article said. Very big. Nakano From ridge to separation. Right in the middle of the north and south. There is a pole in the middle. Everything ends in the westernmost part. It's for yin instrument. Everything ends in the westernmost part. It's for yin instrument. Yang is the son of Xiao. Older than you. The weather is not cloudy at noon. Always at sea. Four elephants were born. Four images are four o'clock. Spring is not very sunny. Xia. It's not very cloudy in autumn. Winter is always cloudy. Lao Yang's old Yin is 96 years old. Six yang and less yin, seven or eight. So the four elephants are decided by gossip. Among Tai Chi practitioners. Heaven and earth are divided into yin and yang. Eryi also. The next Yang Sheng earthquake in Kunming. Shaoyang also. Two young people give birth to exchange. What Sanyang did was Lao Yang. One was born under the talented Yang. Shaoyin also. Two yin and three yin Kun are old yin. Six hexagrams are ready. Fire and water meet. Fire and water are done after making friends. It is heaven and earth. Dongyang, Yin Xi. The horizontal one is for daily use. It is cloudy in the north of Nanyang, which is also the reason why the sub-ridge earthquake is on the ground. From top to bottom. Gan Kun gave birth to six children. Leaving the ridge, there are four corners. So the four elephants have gossip. "