Yao Xing
Upon Qifu Gangui's arrival in the Later Qin capital Chang'an, Yao Xing created him the Marquess of Guiyi. In 401, Yao Xing inexplicably gave Qifu Gangui his entire captured army back to him and had him defend his old capital Wanchuan, effectively putting him back in the position he had before, but now as a Later Qin vassal. He quickly put his governmental structure back in place, but now with inferior titles to show submission to Later Qin. Later in 401, Yao Xing sent Qifu Gangui to serve as Yao Shuode's assistant in a major campaign against Later Yang's emperor Lü Long (Lü Guang's nephew), forcing Lü Long's submission.