In the infinite years.
When Ye Bei traveled around, in order to experience the red dust, he went to fortune-telling for the laity more than once.
And based on those experiences, in this era, he also personally fabricated three classics, namely "Joint Mountains" in Xia Dynasty, "Return to the Hidden" in Shang Dynasty, and "I Ching" in Zhou Dynasty.
Each one was based on some experience that Ye Bei recorded through his travels.
Later, with Ye Bei's acquiescence, those ancient books spread slowly...
It was eventually integrated by the world and collectively referred to as "The Book of Changes".
The "Book of Changes" encompassed everything from law and social order to group theory, and its content was vast and subtle, all-encompassing, and it was almost the source of the civilization of entire China.
Fortune telling!
It was also called the act of speculating on the destiny of a person to take the blame, which was true metaphysics.
