《北齐书·列传·卷二十》
则投奔广州刺史郑先护，与先护一同抗抵元颢。颢败，迁征虏将军，出任东徐州防城都督。
则奔广州刺史郑先护，与同拒颢，颢败，迁征虏将军，出为东徐州防城都督。
Ze then joined forces with the governor of Guangzhou, Zheng Xianhu, and together with Xianhu he resisted Yuan Hao. When Hao was defeated, Ze was promoted to the rank of general of pacification of the barbarians, and was appointed governor of Fangcheng in eastern Xuzhou.