A strange book on Chinese magic, "Dunjia Fuying Jing" uses Dunjia to discuss the use of Dunjia in marching and avoidance, as well as bad luck in all things. It is said to be "precise in its establishment and researched in detail. It should not be abandoned by the family of the five elements." The art of Qi Men Dun Jia has a long history. It became more and more developed in the Song Dynasty and was taught by many people. In response to the order of Emperor Renzong of the Song Dynasty, Yang Weide, the master of Shushu in the Song Dynasty, compiled and summarized the Dunjia Shu of the previous generation and completed this ancient encyclopedia.
