In the process of describing the Book of Changes, History of Literature and Art in Hanshu said that "people are more sacred and history is three ancient". The three saints are Fuxi, King Wen and Confucius.
There are many scholars who deny Confucius' Book of Changes, such as Ouyang Xiu and Gong Zizhen. Qian, a contemporary scholar, thinks that "Six Classics are not deleted"
Lu Xun asserted in the Outline of China Literature History: "It is extremely difficult to know who the author is, and it is also based on speculation that he owes a saint." Confucian scholars in the Qing Dynasty almost thought that "Confucius had no classics before", while Kang Youwei thought that "the Six Classics were all written by Confucius".
"two couples, change if you don't repeat it":
The so-called "22 pairs" refers to the 64 hexagrams in the Book of Changes. There are 32 pairs, such as Gankun as a pair and Tunmeng as a pair, which are in turn correct. The so-called "if you don't reverse it, you will change it" means that each pair of hexagrams and paintings in the Book of Changes is either reversed or reversed. Superposition, upside down; Change.
On the other hand, if (Tun) is in turn (Mongolia) and (Need) is in turn (litigation), this is repetition. (Gan) is the opposite of (Kun), and the six dry hexagrams are all yang hexagrams, while the six Kun hexagrams are all yin hexagrams, and (H) is the opposite of (greater than). The upper and lower H are yang hexagrams, the middle four hexagrams are yin hexagrams, and the upper and lower H are yin hexagrams.
Reference to the above content: Baidu Encyclopedia-Zhouyi