Ji Gong
... wrote the 'Preface to Six Harmonies Boxing' in the 15th reign year of the Qianlong Emperor [1750]. Inside it says, '... when [Yue Fei] was a child, he received special instructions from Zhou Tong. He became extremely skilled in the spear method. He used the spear to create methods for the fist. He established a method called Yi Quan" [意拳]." Mysterious and unfathomable, followers of old did not have these skills. Throughout the Jin, Yuan and Ming dynasties few had his art. Only Ji Gong had it. (於乾隆十五年為"六合拳"作序云："岳飛當童子時，受業於周侗師，精通槍法，以槍为拳，立法以教將佐，名曰意拳，神妙莫測，盖从古未有之技也。)