The Book of Changes is the Book of Changes, one of the Three Changes (there is another view: the Book of Changes is the Three Changes, not the Zhou Book of Changes). It is one of the traditional classics. According to legend, it was written by Jichang, King Wen of Zhou Dynasty. It is composed of two parts: "Jing" and "Biography". The "Jing" mainly consists of sixty-four hexagrams and three hundred and eighty-four lines. Each hexagram and line has its own explanation (hexagram words and line words), which are used for divination. "The Book of Changes" did not put forward the concepts of Yin and Yang and Tai Chi. The book that talks about Yin and Yang and Tai Chi is the "Book of Changes" influenced by Taoism and Yin and Yang schools. "Zhuan" contains seven kinds of texts explaining hexagrams and line speeches and ten articles, collectively called "Ten Wings", which are said to have been written by Confucius.
In the Spring and Autumn Period, official schools began to gradually evolve into private schools. The study of Yi followed each other and developed gradually. With the rise of hundreds of schools of thought, the study of Yi diverged accordingly. Since Confucius praised the Yi, "The Book of Changes" has been regarded as the Confucian holy book and the first of the six classics by Confucianism. Outside of Confucianism, there are two branches of Yi that developed side by side with the Confucian school of change: one is Zhishu Yi, where the old forces still exist; the other is Laozi's Taoist Yi, which began to be divided into three branches. ?
The "General Catalog of Sikuquanshu" divides the origin and changes of the history of Yixue into "two schools and six sects". The two sects are the Xiangmao sect and the Yili sect; there are six sects, one is the divination sect, the second is the Yuxiang sect, the third is the fortune sect, the fourth is the Lao Zhuang sect, the fifth is the Confucianism sect, and the sixth is the Shishi sect.
The Book of Changes is the theoretical source of natural philosophy and humanistic practice in traditional Chinese thought and culture. It is the crystallization of the thoughts and wisdom of the ancient Han nation and is known as the "source of the great road." The content is extremely rich and has had a profound impact on China's politics, economy, culture and other fields for thousands of years. Most scholars believe that "Yi Zhuan" was written during the Warring States Period. Since Ouyang Xiu's "Yi Tongzi Wen" and Su Shi's "Book of Changes", few people have believed that Confucius was responsible for the writing of the Yi Zhuan for hundreds of years.