What do you think of the hexagrams after the Zhouyi is calculated?

No, it's not. Every time the three copper coins are shaken out, they are watched together. If the word "single" is shaken, it is Yang (less Yang) and recorded as "-"; If the word "demolition" is shaken, it is cloudy (less cloudy) and recorded as "-"; If the three shakes are all on the back, it is called "heavy", which is Yang Yao (Lao Yang) and recorded as "O"; If all three words are shaken, it is called "horizontal", called Yin (old Yin) and recorded as "X". So if you shake it six times, you can get a six-pointed star. It's not that there are 18 yin-yang hexagrams. Among them, Lao Yin and Lao Yang are dynamic, but when they move, they change. If they get these two trends, they will change their yin and yang, that is, Yang becomes Yin and Yin becomes Yang. If you change, you will change your mind. In this way, you will change your mind. This divination method was called "replacing money with money" in ancient times. Take fifty yarrow as the week of divination, which is the "number of great extension" mentioned in the copula. But divination with fifty yarrow trees requires a very complicated process. Only after "four camps become easy" and "eight out of ten divinations" can we get a divination. In the Tang dynasty, copper coins were used to shake divination instead of yarrow.