Yi Jinsheng's key is whether Sun Mingxin's class is credible.

Sun Mingxin is the pioneering work of Yi Jinsheng, which enjoys a high reputation and influence in the field of Yi studies. Lecturer in the Book of Changes of Chinese Studies, architectural engineer, psychological counselor and other multiple identities, as a feng shui consultant in the architectural design institute. This background has enabled me to have the professional knowledge and experience to teach Yi-ology-related content.