모용수
Zhai Liao, a royal family member of the West Ding Ling, followed the horde migrate from Kazakhstan into China, his cousin Zhai Bin (翟斌), khan of the horde, who wage war against Former Qin's emperor Fu Jiān in 383, supported Later Yan's founding emperor Murong Chui when Murong Chui rebelled against Former Qin as well and established Later Yan. However, in 384, as Murong Chui sieged the important city Yecheng, which was defended by Fu Jiān's son Fu Pi, Zhai Bin, seeing that Murong Chui was unable to capture the city quickly, began to consider other options. When, in particular, he requested a prime ministerial title from Murong Chui and was refused, Zhai Bin prepared to ally with Fu Pi instead, but his plan was discovered, and he was ambushed, along with his brothers Zhai Tan (翟檀) and Zhai Min (翟敏). It was apparently at this time that Zhai Liao and his cousin Zhai Zhen (翟真) fled with some of their Dingling troops and resisted Later Yan's subsequent campaigns to take the territory north of and around the Yellow River. In late 384, Zhai Liao was defeated by Murong Chui's sons Murong Lin and Murong Nong and forced to flee to his cousin Zhai Zhen. In 385, Zhai Zhen's subordinate Xianyu Qi (鮮于乞) assassinated him and attempted to take over, but the Zhai family struck back and killed him; another cousin of Zhai Liao's, Zhai Cheng (翟成), succeeded Zhai Zhen, but many of their subordinates surrendered to Later Yan. In fall 385, Murong Chui attacked Zhai Cheng, instead, Murong Chui had huge casualties and lose the advantage of the battle, but Zhai Cheng's subordinate Xianyu De (鮮于得) assassinated Zhai Cheng and surrendered his army. His surrendered Dingling troops were largely slaughtered.