Li Shimin can be said to be one of the most famous emperors in history, but in the eyes of the society at that time, he had a great stain, that is, the throne did not come clean. His eldest brother can be said to have a good hand of cards, the support of the third brother, the choice of his father, and so on. But why didn't Li Jiancheng keep his throne?
Many people may be influenced by film and television dramas to say, "Li Jiancheng is talentless and immoral, and it is not normal to be defeated by Li Shimin?" In fact, this is the TV series in order to flatter Li Shimin can scandalize Li Jiancheng. In fact, Li Yuan was able to raise troops entirely because Li Jiancheng secretly recruited troops for him, and Li Jiancheng also made great achievements in the battlefield.
The others do not say that the identity of the eldest son alone is enough to get the throne, and with Li Jiancheng so excellent, this throne is appropriate. However, Li Jiancheng was indecisive, and long ago, Li Yuanji and Li Jiancheng discussed to get rid of Li Shimin, and bought Li Yuan's maids around him, so that he could constantly say bad things about Li Shimin to Li Yuan.
It can be said that compared with Li Jiancheng, Li Yuanji is more ruthless, and this alone is not enough, Li Yuanji even arranged for his confidants to hide in Li Shimin's palace and prepare for assassination. However, at the critical time, Li Jiancheng came out to stop it, which made Li Shimin escape by chance. However, although this assassination caused Li Shimin to survive because of Li Jiancheng's kindness, it laid hidden dangers for Li Shimin's rebellion in the future.
In fact, in addition to being indecisive, Li Jiancheng did underestimate this younger brother of his, and at that time Li Shiming had a subordinate named Wei Chi Jingde. Li Jiancheng asked Li Yuanji to bribe Wei Jingde, but he had not previously investigated Li Shiming's ability to win over people, which led to the failure of the co-optation and exposed the plans of the two brothers.
Because of Li Jiancheng's caution, many plans failed, and in the end, he could only speak in front of Li Yuan, taking away Li Shimin's military power and co-opting the ministers who had good relations with Li Shimin. In fact, at that time, Li Shimin had no way to go, which led to the Xuanwumen incident. In fact, Li Jiancheng had many opportunities to kill Li Shimin, but he was indecisive and missed many opportunities, which made Li Shimin fight back.