《资治通鉴·晋纪·晋纪三十》
慕容永担心晋国不肯出兵，又派他的太子慕容亮到东晋充当人质。后燕平规追捕慕容亮，追到高都把他抓住。
永恐晋兵不出，又遣其太子亮为质；平规追亮，及于高都，获之。
Murong Yong worried that the Jin Kingdom would not dispatch troops, so he sent his crown prince, Murong Liang, to serve as a hostage in the Eastern Jin. The Later Yan Ping Gui chased and captured Murong Liang in Gaodu.