姚兴
While Tufa Rutan was nominally a Later Qin vassal, he did not actually wish to serve Yao Xing long, and in 407 he proposed to Qifu Chipan (who had then temporarily taken over his father Qifu Gangui's troops, since Qifu Gangui was detained at the Later Qin capital Chang'an) an alliance, but Qifu Chipan executed his messengers and delivered their heads to Yao Xing. Still, at this time, Southern Liang's power was at its apex.