“玄武门事变”后,李世民拨乱反正,刚坐稳位子,就开始了内部人员的整改与肃清。这次,魏征必死无疑。因为,是他献计献策给李建成,让李建成及早动手除掉李世民。李世民如何处置他的政敌李建成的谋士魏征呢?就在李世民拿不定主意的时候,魏征不请自来。魏征来后,摆弄起两个透明的杯子,每个杯子都是半杯水,一个杯子里水是浑浊的,另一个杯子里的水是清澈的。魏征摆弄好,对李世民说:“殿下, ”Xuanwumen Incident “, Li Shimin order to chaos anyway, just sit tight seat, began internal staff rectification and elimination. This time, Wei Zheng dead no doubt. Because it is his proposal to Li Jiancheng, so early Li Jiancheng get rid of Li Shimin. Li Shimin how to dispose of his political opponents Li Jiancheng's adviser Wei Zheng? Li Shimin uncertainty in the time, Wei Zheng invited. After Wei Zhenglai, put two transparent cups, each cup is half a glass of water, a cup of water is turbid, another cup of water is clear. Wei Zheng put it well, said Li Shimin: ”Your Highness,