(A) Zheng Xuan's "Yao Chen" theory. Zheng Xuan's "Sebrina" rule is one of the new theories in China's image mathematics. Examples are twelve hexagrams of Gankun, twelve hexagrams of Jiaxu, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai. And it can be matched with twenty-eight nights and twenty-four spirits.
This theory is far from Fang Jing's "Eight Diagrams and Six Numbers" method in the Western Han Dynasty, but it has not changed. In Qing Dynasty, Huidong School published Zheng Xuan's Yao Chen Tu and Yao Chen's Twenty-eight Nights Tu according to relevant documents, which can be used for reference.
Zheng Xuan's Yi-ology works have long been lost. He used "Zhou Chen" as an example to explain the heritage of the Book of Changes, but today it is only scattered in the annotations of the Book of Changes, and is quoted by later books such as Shi Mao Zhengyi, Yang Gong Zhengchuan Yi in the Spring and Autumn Period, and Li Sanzheng Yi.
Take for example, scholars in the Qing Dynasty such as Wang, Wang, Wang and Wang. Attack and retort that Lu and Lu are yin and yang, so they can coexist, but gan and he can't coexist. If you match the law with the law, the meaning will be difficult to understand.
Wu Yiyin's Xuekao also said: "Li Dingyou's Jieji supplements Zheng Du's theory of deleting Chen Zhi, and he knows the trade-offs." However, it is debatable whether the theory of "Sebrina" is applicable to the interpretation of Yi. However, it is an original attempt by Zheng to create this case, explain the purport of the Book of Changes and analyze the symbolic significance of the Book of Changes, and its influence in the history of the Book of Changes cannot be underestimated.
(2) Xun Shuang's theory of "lifting". The philosophy of Zhouyi emphasizes the way of "Yin and Yang". All things return to Yang Dao, and its meaning is dominant; Anyone who belongs to vagina, its meaning is mainly to retreat.
The rule of "ascending and descending" advocated by Xun Shuang is actually rooted in the theory of yin and yang advancing and retreating in Zhouyi. It is considered that the second place in yang should be promoted to the fifth place, and the fifth place in yin should be reduced to the second place. Dryness is yang and Kun is yin, so it is also called "dryness goes up and Kun goes down"
Huidong's Book of Changes pointed out: "Xun Ciming's Book of Changes says that Yang should be promoted to Kunwu as the monarch and Yin should be relegated to the position of minister. Gaigan promoted Kun as a hurdle, and Kun reduced his achievements to separation. When Gigi finalized the case, Liuyi was already there. "
Huidong also believes that Xun Shuang's theory of "ups and downs" is consistent with the ancient professional law contained in Zuo Zhuan, and is the same as Yu Fan's theory of "righteousness" (that is, "be yourself", see below).
His book "Han Yixue" said: "Zuo Zhuan Shi tells that Lu lost the people and won the people." In Yi, he said, "Dazhuang" is Heaven. A doctor who says "92" should be promoted to "5" as a monarch. Ciming's theory accords with the ancient occupation law. Therefore, the same is true of Xiang Zhong's annotation Yi. (Original note: Wang Bi's "Thailand" June 4th Note: Dry music is the answer, and Kunle is the answer. This is also the meaning of lifting, and Wang Bi doesn't say lifting. )"
On the other hand, Wu Yiyin's textual research holds that Xun's theory is based on the meaning of "Yang advances and Yin retreats" in Yi Chishui, while Yu Fan's "positive" theory is based on the Zhouyi Shentongqi, which is actually different. In all fairness, Xun Shuang's theory of "ascending and descending" and Yu Fan's theory of "Cheng Jiji" may not be consistent, but both theories discuss the philosophical laws of the sixty-four hexagrams in Zhouyi from the perspective of the change of images, and their theoretical ends are quite consistent.
In short, Zheng Xuan's "Sebrina" theory is a special way to interpret the Book of Changes by using "medical images", and Xun Shuang's "Shangxia" theory is a means to reveal the purpose of the Book of Changes by analyzing the trend of "medical Zen".
Both of these theories appeared in the late Eastern Han Dynasty, which added new blood to the image number of Zhouyi, which had been popular for a long time at that time, and actually prompted Yu Fan to develop the image number theory of Zhouyi to a peak in the late Eastern Han Dynasty.