Murong Sheng
In 398, as Murong Bao's troops were worn out by constant wars and apprehensive of Murong Bao's orders to head south to attack Northern Wei, they mutinied under the command of the officer Duan Sugu (段速骨), who supported Murong Long's son Murong Chong (慕容崇) as figurehead. In the rebellion, many imperial princes were killed, but because Murong Xi and Murong Chong were friends, Murong Chong exerted his influence to have Murong Xi spared. Later in the year, after Duan was killed by Lan Han, who then laid a trap for Murong Bao and had him killed as well and usurped power, Lan Han created Murong Xi the Duke of Liaodong, with the function of having him continue the worship of the Murongs' ancestors. When Murong Bao's son Murong Sheng subsequently killed Lan Han in a coup in late 398 and restored Later Yan, he used only a princely title initially, so imperial princes' titles were reduced to ducal titles. In accordance, Murong Xi's title became Duke of Hejian. Murong Sheng also made him a major general. In 400, when Murong Sheng attacked Goguryeo, Murong Xi served as his forward general, and contributed greatly to the victory. It was at this time that Murong Sheng commented: