Li Shimin, Emperor Taizong of Tang Dynasty, was the second son of Li Yuan, the founding emperor of Tang Dynasty. He won the throne by launching the "Xuanwumen Revolution" to kill his younger brothers Cheng Jian and Yuan Ji. After Emperor Taizong proclaimed himself emperor, he made great efforts to govern the country, creating a stable situation of "Zhenguan rule" and making great contributions to national security. However, his hands and feet in Historical Records are extremely disgraceful, and it is impossible for future generations to know the true face of history at that time and should be criticized.

The reason why Emperor Taizong wanted to revise the national history was to whitewash the succession. Emperor Taizong's throne was not legally inherited, but was obtained by killing his brother and forcing his father. This kind of behavior obviously runs counter to the feudal patriarchal clan system and feudal ethics, and the feudal rulers can't let future generations know about it, lest they imitate it. Therefore, after winning the throne, Emperor Taizong began to revise the national history to defend himself. When Zhenguan Mitchell wrote Records of Emperor Taizong and Records of Emperor Taizong, he laid out the great military achievements of Emperor Taizong, tried his best to obliterate the achievements of Prince Cheng Jian in the process of establishing the Tang Dynasty, and greatly devalued the role of Emperor Taizong. But this is not enough, so they put the focus of revising the national history on Jinyang's plot to arise. They described Jinyang's plot to arise as the careful planning of Emperor Taizong, while Gaozu was completely passive. Its purpose is to describe Emperor Taizong as the real founder of Wang Ye in Li Tang, so that his throne can gain the legitimacy similar to that of Emperor Gaozu who regarded himself as the emperor and respected his father as the emperor's father.