姚兴
In 407, Murong Chao sent his official Feng Kai (封愷) to Later Qin to negotiate to have Yao Xing turn his mother and wife over to him. Yao Xing demanded that he submit as a vassal and further give Later Qin either the court musicians of Former Qin (who had, after much travels, settled down in Southern Yan by this point) or 1,000 captives from Jin. Murong Chao readily agreed to be a vassal, but hesitated at both alternative demands. Eventually, in fear of retaliation from Jin, he chose to turn over 120 musicians. Yao Xing then delivered his mother Lady Duan and wife Lady Huyan to him. In 408, he honored Lady Duan as empress dowager and created Lady Huyan empress.