Du Ruyi followed Li Shimin on his southern expedition to the north, counselors gave advice on the military, and Du Ruyi's merits in ruling Du Ruyi were not small, so how did the Du family almost annihilate the clan by Li Shimin after Du Ruhan's death?
In fact, after Du Ruyi's death, Li Shimin was still good to the Du family, Du He was Du Ruyi's second son, Li Shimin married Princess Chengyang to him, the eldest son Du Zhuo inherited the dukedom of the country, even the Du family business followed the light, Du Yan was the rate, Du Chuke was the Shangshu of the Ministry of Works, originally the Du family, is one of the two largest families in Jingzhao, "Jingzhao Weidu, go to the heavens and three feet" is said to be the Wei family and the Du family, so it seems that the Du family is a saint, how can Li Shimin rectify the Du family?

After Du Ruyi's death, the Du family still wanted to restore the glory of Du Ruhan's lifetime, so they had to support the next emperor and strive for the status of a long meritorious warrior, which was understandable, but the Du family had done a little too much.
Du Jia Du He supported Li Chengqian, Du Chuke supported Li Tai, this is the same as the Zhuge family in the Three Kingdoms period, stepping on several boats, no matter who finally ascends to the throne, the Du family can get rich, and Du He is full of firepower, vigorously supportIng Li Chengqian, the status in the Eastern Palace is like Du Ruyi when Li Chengqian lost power, but Du He turned to Li Tai when Li Chengqian lost power, and the practice of stepping on two boats on both sides and three knives was seen by Li Shimin, can he have no idea about the Du family? Doing so will not be killed by Li Shimin, that is, Du He is too cruel, wants to make Li Shimin too emperor, just like Li Yuan, this touches Li Shimin's bottom line, the dispute between the concubines you support, do not support anyone, Li Shimin will not be good, but you kill the emperor, then you can make a mistake, Li Shimin is the struggle over, saw through Du He's conspiracy and trickery, for Du He's practices are recorded in the old and new Tang Books, Du He said to Li Chengqian: "Lang evil Yan Li Ren good star number, words in the sky are changing, it is advisable to build a big thing, His Majesty should be the Emperor Taishang. ”
Li Shimin was furious and killed Du He, and Du Chuke was also implicated in exile to Lingnan, and Du Chuke, as Li Tai's adviser, li Shimin publicly announced that Du Chuke's crime should be beheaded, but Li Shimin still had feelings for Du Ruqian, did not want to kill him completely, and looked at Du Ruqian's face, spared Du Chuke's capital crime, and dismissed him from office and put him under house arrest.
The Du family's practices, for the ancient big family, are normal things, stepping on two boats is beyond reproach, it is estimated that Li Shimin is angry, will not hurt the killer, bad is bad in Du He, the emperor Li Shimin who is still reigning, Li Shimin can not stand such a thing, the same period of Fang Xuanling's son Fang Yi'ai, also bet the treasure on Li Tai, they did not bet on the treasure, they did not bite jin smart, if they are honest officials, relying on Du Ruyi's shadow, I will not be killed by Li Shimin!
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