Western Han Dynasty: Tian Heshou () Wang Tongzi Zhong, (Luoyang) Zhou Wangsun, (Liang) Ding Kuan, and (Qi) Fu Sheng, all of whom wrote several Yi Zhuan, but later generations have lost their lives. Secondly, from the first line of Wang Tongzi (), Yang He was passed down and his character was respected. No respect spread to Beijing rooms. Liang Qiu sent congratulations from the room. Here comes He Chuan. Wang Jun and Ding Kuan are introduced, followed by Tian Wangsun, Wang Sunsun, yu zhang and Yu Pengxuan. All the above are the inheritance of famous scholars who specialize in the study of Yi-ology.
As for Yin and Yang, Najia and Guaqi, they are easy to learn. , is another department after Tian He and Ding Kuan. The theory of "treating yin and yang and invigorating qi" was put forward by Wang and others. Happiness is passed on again, and words are prolonged. He is the author of Yi Lin, completely breaking the path of Zhouyi.
Another Fang Jing inherited Jiao Yanshou's Yi-ology, and wrote Yi-zhuan of Fang Jing, which opened the door for Yin and Yang to learn the number of images.