永徽六年(655年),唐高宗以王皇后无生育为由,要废掉她,立武昭仪为后。此时,身为长安县令的裴行俭,敏锐地观察到这件事的后果,料定“国家忧患必从此始”。于是,他不顾位卑和风险,向太尉长孙无忌和左仆射禇遂良作了汇报,并商议对策。后来的事果然被裴行俭言中,李唐宗室被大量屠杀,国号也“改旗易帜”。裴行俭的所为很快被人告发,他被逐出京城,降职为西州都督府长史,但他并未因此而后悔。这个裴行俭,乃绛州闻喜(今山西省闻 Yong emblem for six years (655 years), Emperor Gaozong Wang Queen no fertility ground, to destroy her, Li Wu Zhaoyi for the post. At this time, as Chang’an magistrate Pei Xingjian, keenly observed the consequences of this incident, expected “” national crisis will begin “. So, he ignored the inferiority and risk, to the captain Sun Wuji and left servant Shui Su Liang made a report, and discuss countermeasures. Later, the matter really was Pei thrifty, Li Tang was a large number of massacre room, the country is also ”flag change flag ". Pei Xingjian’s behavior was soon reported, he was expelled from the capital, demoted as governor of Xidu Prefecture, but he did not regret it. The Pei Xingjian, Jiangzhou Wenxi (now Shanxi Province smell