How did the sixty-four hexagrams in Zhouyi come into being?

The composition of the sixty-four hexagrams in Zhouyi is as follows:

At the end of Shang Dynasty, Shang Zhouwang, the monarch, was ignorant, and Ji Chang, the commander-in-chief of the western regions (later Zhou Wenwang), widely practiced benevolence and righteousness, developed production and won the hearts of the people. This aroused Shang Zhouwang's suspicion and dissatisfaction. Shang Zhouwang listened to rumors and imprisoned the spinulosa in the then national prison, Woori City.

Ji Chang was imprisoned for seven years. In this long day, Ji Chang took yarrow growing on the prison floor as a tool and selected eight natural objects from nature as the origin of all things. Then abstract the ever-changing and complicated things in the world into two basic categories: yin and yang; He regards the combination of rigidity and softness as relative and changeable, which is his basic view on the world and life. Finally, Ji Chang superimposed the eight diagrams on each other to form 64 different combinations of six strokes, namely "Sixty-four hexagrams".

Introduction to Zhouyi:

The Book of Changes, one of the three changes, is one of the traditional classics. According to legend, it was written by Zhou Wenwang Jichang, including The Book of Changes and Biography. The classics are mainly composed of 64 hexagrams and 384 hexagrams, each of which has its own interpretation of divination. It contains seven languages * * * and ten quatrains explaining hexagrams, which are collectively called "Ten Wings" and are said to have been written by Confucius.

During the Spring and Autumn Period, official schools began to evolve into private schools. There is a gradual development before and after the Yi-ology, and a hundred schools of thought contend, so it is easy to divide. Since Confucius praised the Book of Changes, the Book of Changes has been regarded as a Confucian classic and the first of the Six Classics by Confucianism. In addition to Confucianism, there are two schools of Yi-ology and Confucianism-Yi-Yi, which develop in parallel: one is Yi-ology, which still exists in the old forces; The other is Laozi's Taoist Yi, which began to be divided into three branches.