The Book of Changes is the oldest and most profound classic in China. It is said that Fuxi's remarks were summarized and revised (at the same time, the gossip of Yijing was produced). It is the crystallization of China's 5,000-year-old wisdom culture and is known as "the head of the group classics and the source of the avenue". In ancient times, it was the study of emperors and a required skill for politicians, strategists and businessmen. The Book of Changes is essentially a book about divination. "Divination" is to predict the development of future events, and The Book of Changes is a book that summarizes the laws and theories of these predictions. I ching is later than I ching. Yijing is a divination book in the pre-Qin period, which contains many philosophies. The profound philosophical thought of the Book of Changes is limited to the Book of Changes, which is only a small microcosm and not comprehensive. Yijinjing only uses some related contents in Yijing that are conducive to popularizing its teachings, and has not been widely absorbed.

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