This is a Quintessence Series of Da Cheng Quan (Yi Quan), demonstrated and explained by Wang Yongxiang. Base on the theory and practice of Yi Quan of Mr. Wang Xiangzhai, Wang Yongxiang generalizes the effective training method on three disputing forces form the internal to the external. It is used for teaching or combat, you can get greateffect, and attack or defend quickly. The theory of Yi Quan emphasizes the philosophy, namely it should be cooperated with thought, and it isn’t only the force. The great benefit to practices the Yi Quan is to contend with nature environment with your whole body, and don’t use the part of body to attack or defend.