He and Xiaoxiangzi later suspected that each other was intending to keep the manual for himself. They fought to seize possession of the book and ultimately Yinkexi killed Xiaoxiangzi but he was also fatally wounded and remained in a moribund state.
The tension between He and Xiaoxiangzi escalated when they suspected that each other was trying to keep the manual for themselves. This led to a violent confrontation over the book, resulting in Yinkexi's fatal attack on Xiaoxiangzi, who also suffered severe injuries.