《新唐书·列传·卷七十四》
皇帝因为管理工作才上路，下诏任命左仆射兼管旧的使职。
帝以计务方治，诏以仆射领使如旧。
The emperor was on the road because of his management work, and he issued an edict to order Zuo 僕射 to take charge of the old position concurrently.