苏定方
As of 657, during the reign of Emperor Gaozong, Ren Yaxiang was serving as Protector General of Yanran (燕然, headquartered in modern Bayan Nur, Inner Mongolia), when he was made a deputy to the general Su Dingfang in Su's campaign against Western Tujue's Shabuolüe Khan Ashina Helu (). He later participated in Su's battles against Ashina Helu and was a participant in the victories, which ultimately resulted in Ashina Helu's capture by another deputy of Su, Xiao Siye ().