There are three legends in the Book of Changes. What are the other two besides the Book of Changes?

The Book of Changes includes Lianshan, Guizang and Zhouyi [1], but because Lianshan and Guizang are basically lost, the Book of Changes actually refers to Zhouyi. The Book of Changes describes the change of state with a set of symbol systems, and shows the philosophy and cosmology of China's classical culture. Its central idea is to describe the changes of everything in the world with the unity of opposites of Yin and Yang.

I ching in a broad sense includes I ching and I ching. The Book of Changes is divided into 30 hexagrams and Xia Jing into 34 hexagrams. Because the Book of Changes was written very early, around the Western Zhou Dynasty, the meaning of words evolved with the development of the times, and the content of the Book of Changes was not easy to read during the Spring and Autumn Period and the Warring States Period, so people in the Spring and Autumn Period and the Warring States Period wrote Ten Wings to interpret the Book of Changes.

It is generally believed that the Book of Changes was originally a book of divination, but its influence spread throughout China's philosophy, religion, medicine, astronomy, arithmetic, literature, music, art, military and martial arts. Since17th century, the Book of Changes has also been introduced to the west.