There was a blank period in the development history of the theory of the Five motions and Six qi, which was the period of the late Han, Wei, Jin and Southern and Northern Dynasties before Wang Bing discovered the "seven great essays", so some scholars proposed the theory of luck that began with Wang Bing. Through studying the literature of this period, it is found that this period is not a blank period, but influenced by Taoism at that time, and there is a secret form of communication. This article makes a detailed review and research on this.