《旧唐书·列传·卷八十》
关播多次上奏说李元平等人都可任将相，请求考查任用他们，皇帝认为他说得对，任命李元平为补阙。
播累奏云元平等皆可将相也，请阅试用之，上以为然，以元平为补阙。
Guan Bo repeatedly memorialized the emperor about Li Yuanping and others, stating that they were capable of serving as generals and prime ministers and requesting that the emperor consider and appoint them. The emperor agreed, and appointed Li Yuanping as a supplementary official.