唐代的选官制度,经历了一个逐步调整、不断完善的过程。在官员选任的具体操作中,始终面临着一些两难的选择。即如高宗时曾任吏部侍郎的魏玄同所言,“群司列位,无复新加,官有常员,人无定限。选集之始,雾积云屯,擢叙于终,十不收一。淄渑杂混,玉石难分,用舍去留,得失相半”~([1])。魏玄同的这段话实际上指 The system of selecting officers in the Tang Dynasty underwent a process of gradual adjustment and improvement. In the specific operation of officials’ appointment, they always face some dilemma. For example, when Wei Zongshi, former minister of the Ministry of Justice, said: “There is no new addition to the group secretary, but there are no officials in the rank and file.” At the beginning of the anthology, Do not receive one. Zi Zi hybrid, jade difficult to use, to leave homes, gains and losses "~ ([1]). Wei Xuan Tong’s remark actually means