. The General Catalogue of Sikuquanshu divides Yi-ology into two schools and six schools. Two schools refer to the Imagism School, and six schools refer to the Divination School, the Auspicious School, the Accident School, the Old Zhuang Zong School, the Confucian School and the Historical School. In fact, six cases can be attributed to two schools, three cases of divination, auspiciousness and nature belong to the school of elephant mathematics, and three cases of Laozi, Zhuangzi, Confucianism and history belong to the school of righteousness. The academic circles generally call the Yi-ology school that interprets the Book of Changes in an abstract and general sense as the Yi-ology school, and the Yi-ology school that interprets the Book of Changes in concrete images as the Image School. Judging from the whole development process of the history of Yi-ology, the mutual criticism between the two factions has never stopped. Contemporary academic circles have made in-depth and fair research on the school of righteousness and reason; The research of object mathematics school is not deep enough and unfair.

Image number school is biased towards image number, focusing on inventing various image number styles; The school of Righteousness lays particular stress on Righteousness, focusing on propagating their respective philosophical and ethical thoughts. Even so, they are biased, but they are not biased. Those who talk about images and numbers do not abolish righteousness, and those who talk about righteousness do not abolish images and numbers. In the Song Dynasty, there was a trend of confluence and complementarity, but this tradition was not well developed in Yuan, Ming and Qing Dynasties until modern times. In essence, the image number school and the righteousness school actually explain the meaning under the guise of image number, that is, "illusion means meaning" and "illusion means enlightenment", but the image number and meaning they explain are different.