李世民有一只鹞子,矫捷凶猛,又极听话,因此十分珍爱它,无事时总爱架着它玩。有一天,李世民把鹞子放在自己的胳膊上,正玩得开心,只见魏征急步走来。魏征曾多次劝他不要玩物丧志,因此他很怕魏征看见,在慌乱之中顺手把鹞子藏于怀中。等魏征说完话走出宫去,李世民赶忙从怀中取出鹞子,不料已经闷死了。由这一则小事我们便不难理解“贞观之治”何以形成,魏征死后,李世民说过这样一段话:“以铜当镜子,可以端正衣帽;以历史当镜子,可以知道兴亡成 Li Shimin has a prickly heat, agile and agile, very obedient, so very cherish it, no matter always love to stand it play. One day, Li Shimin put prickly heat on his own arm and was having a good time. He saw Wei Zheng stepping forward. Wei Zheng has repeatedly advised him not to play a playwright, so he was afraid of Wei Zheng see, in the panic easily shuttlecock hidden in his arms. When Wei Zheng finished saying something out of the palace, Li Shimin rushed out from his arms, but unexpectedly suffocated. From this trivial matter, we can easily understand why the “rule of Zheng Guan” was formed. After Wei Zheng died, Li Shimin said something like this: "When using copper as a mirror, you can correct your coat and hat;