I would like to ask whether the so-called eight-character calculation and Zhouyi fortune-telling use a knowledge system, or are they independent?

In ancient China, when heavenly stems and earthly branches said year, month and day, heavenly stems and earthly branches said time. A person was born four times, which adds up to eight words. Therefore, fortune telling is called pinching or calculating eight characters.

The Book of Changes began with a river map and a book published by Luo, and Fu began with eight diagrams. Zhou Wenwang was imprisoned, and he regarded gossip as sixty-four hexagrams. During the Spring and Autumn Period, Confucius annotated the Book of Changes and wrote copula, and the Book of Changes became a fortune-telling book.

At first, there was no connection between the two. Later, people combined Zhouyi with eight characters, yin and yang, and five elements, and developed into several branches. For example, plum blossoms are easy to count, strange doors are hidden, and so on.

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