As everyone knows, Tang Taizong Li Shimin ascended to the throne of God through the bloody means of "Xuanwumen change", and Tang Gaozu Li Yuan also became the only founding emperor of a unified dynasty to be overthrown in Chinese history. In fact, after the Tang Dynasty unified the world, someone suggested that Li Yuan should pass the throne to Li Shimin.
In addition to the ritual and legal status, Prince Li Jiancheng is almost inferior to Qin Wang Li Shimin, especially Li Shimin has the support of the military service group, the Kwantung scholars and the landlords of the pros, which can be described as "three points" There are two in the world". So why is Li Yuan unwilling to pass the throne to Qin Wang Li Shimin?
Due to the father-son relationship of Li Yuan and Li Shimin and the "Spring and Autumn Period" of the history books, many people in later generations misunderstood the essence of the "Xuanwumen Change" and believed that the "Xuanwumen Change" was in Chinese history. There have been many prince disputes. However, the "Xuanwu Gate Change" is essentially different from other prince disputes.
In general controversy, the power of the prince comes from the power of the father, and the emperor is the supreme judge in the struggle. With the exception of a few faint monarchs who are playing off, the prince's battle for seizure is basically within the control of the emperor, and the prince will not point the fight against the emperor.
However, the power of Qin Wang Li Shimin comes from his nine-dead military exploits, the support of the scholar group, and the distribution of resources for the losers after the war, which has little to do with Li Yuan. Li Shimin's power is not the deferment of imperial power but the representative of his vassal power. Li Shimin's biggest political enemy in the battle for the seizure of progeny by military virtue is Li Yuan.
Because of this, Li Yuan’s passing of the throne to Li Shimin is equivalent to admitting that the vassal power can be replaced by a certain scale. This is something that any emperor with a normal mind will not accept. It can be said that when Li Shimin's vassal power develops to the extent that it can replace Li Yuan, the "Xuanwumen change" is inevitable.
