남연
In 407, Murong Chao, the emperor of Southern Yan, whose mother and wife were then in Later Qin, requested to have them delivered to Southern Yan. Yao Xing agreed to do so if Murong Chao would agree to be a vassal and either deliver Former Qin palatial musicians (who were taken by Western Yan and eventually passed through Later Yan and then Southern Yan) or 1,000 Jin citizens to Later Qin, before his request would be agreed. Murong Chao agreed to yield as vassal, and delivered the musicians to Later Qin. Yao Xing then delivered his mother and wife to him, along with gifts.