After the Xuanwumen Change, why did Wei Zheng betray Li Jiancheng and join Li Shimin?

Because Li Zicheng was stubborn and very proud, Wei Zheng expected him to fail, so he chose to take refuge in Li Shimin.

Because Li Jiancheng was dead at that time, Li Shimin ascended the throne and became the emperor, he did not dispose of Wei Zheng but reused him, so Wei Zheng took refuge in Li Shimin.

Because Li Jiancheng had already been killed by Li Shimin at that time. Li Shimin also attaches great importance to Wei Zheng's talent. So invite Wei Zheng to help him.

It was because he was relatively strong at that time and had military power and political power in his hands, so he wanted to strengthen the centralization of power in this way and eliminate the remnants.

Because he was supported by the people, there were many powerful generals around him, and he wanted to change the government at that time, so he dared to do so.

This is because Li Shimin has a strong military talent, he has accumulated a lot of experience in fighting abroad for many years, and he also has some trusted henchmen around him, so he dares to launch a coup d'état.

Because Li Shimin is very talented, he has a large army in his hands, and he is very confident, so he dares to do this.

Personally, I think that the reason why Li Jiancheng did not have Wei Zheng's suggestion was mainly because Li Jiancheng was overconfident at that time, because according to the ancient inheritance system, the crown prince was the first heir.

There is a saying that Bei Suiyi, in fact, it is normal for Li Jiancheng not to have Wei Zheng's advice. Because the previous dynasties all used the primogeniture system, and although the Tang Dynasty was only established recently, it is likely that the primogeniture system will also be used, because this is the legitimacy. Li Jiancheng is the crown prince, that is, the orthodox heir to the throne, and even if Tang Gaozu Li Yuan did not announce it, Li Jiancheng is also the legitimate heir.

In addition, Li Jiancheng himself also has strength in the imperial court, although his military achievements abroad are not as much as Li Shimin's, but because of the identity of the prince, Li Jiancheng has more advantages. From the perspective of the time, Li Jiancheng really didn't need Wei Zheng's suggestion, because he was most likely the heir of the dynasty, and killing his own brother was a big crime in ancient times, and he would be despised, so Li Jiancheng didn't want Wei Zheng's suggestion.

But the world is impermanent, what Li Jiancheng didn't expect was that the development of the situation was beyond his control, and when he wanted to get rid of Li Shimin, Li Shimin had already taken a step ahead of him and launched the Xuanwumen Revolution that shocked the world, Li Jiancheng was shot by Li Shimin with an arrow, so far, Tang Gaozu Li Yuan announced his abdication, Li Shimin succeeded to the throne, becoming the second king of the Tang Dynasty, and also opened the rule of Zhenguan in the Tang Dynasty, laying the foundation for the glory of the Tang Dynasty in the later period. Of course, the reason why Li Shimin was successful was mainly because Li Jiancheng was too confident in the early stage, thinking that Li Shimin would not dare to kill himself, and when he felt the killing intent from Li Shimin, he would do whatever he wanted, and the struggle for imperial power was so terrifying, but it was a pity that he was too arrogant.

In general, Li Jiancheng did not have Wei Zheng's advice, mainly because he was the crown prince, the legitimate heir, and he also had a certain amount of power in the imperial court, and finally coupled with his arrogant personality, he was finally killed.

Because he was skeptical of Wei Zheng's clever plan at that time, and he thought that Nianyun was too old for Li Yuan, and he would become the emperor sooner or later, and if he was burdened with notoriety, he might be extremely unfavorable to himself, so he didn't.

It may be that Li Jiancheng felt that his son would not behave like this, nor would he betray himself, so he did not have such a suggestion.

Li Jiancheng was very confident at that time, a little conceited, felt that he was very powerful, and did not take Li Shimin in his eyes.

Tang Gaozong Li Yuan had a total of three sons, namely the crown prince Li Jiancheng, the second son Li Shimin and the three-character Li Yuanji. After the Xuanwumen Incident, Li Shimin killed his brother and killed two of his father's few sons, leaving only himself to his father. Just askWhat is the reason why Li Yuan did not transfer troops to kill Li Shimin

There are four reasons for this

First, Li Shimin has already killed both of his brothers, and he is charged with killing his brother, so he will definitely not be stupid enough to kill his father and bear a bigger crime, thereforeLi Yuan is relatively safe, there is no need to fight uncertain battles.

Second, Li Shimin has been fighting outside the country all the year round, and he has slowly cultivated his own power, and he has it in his handsThere are quite a few soldiers and horses in his hands, mastered part of the military power. Even if Li Yuan wanted to transfer troops to kill Li Shimin, he was not completely sure that he would be able to capture him.

Third, Tang Gaozu Li Yuan has a total of three sons, and now two are dead, if you put it againThe rest of this sonwas also executed, and there was no one to inherit the country he had built.

Fourth, Li Shimin has been fighting with his father for many years, making great contributions, accumulating a lot of contacts for himself, and establishing prestige. The strength is comparable to that of the crown prince Li Jiancheng and the king of Qi Li Yuanji, and the judgment is superior. Although Li Yuan is interested in the crown prince, the prince is dead, and the people's will has to let go.

In fact, Li Shimin deserves to be called a good emperor who has the courage to love the country and the people. As early as when he was still the king of Qin, he was kind enough to help the poor, and led the soldiers to clear the obstacles for the founding of the Tang Dynasty, which shows that he has the ability to have the vision of people. Li Shimin's election is the will of the people and there is no controversy.

I believe that when Li Yuan learned that the crown prince Li Jiancheng who he personally chose was dead, he also had the idea of compromising with his second son Li Shimin.

Li Shimin launched the "Xuanwumen Change", but Li Yuan did not transfer troops to kill Li Shimin, mainly for the following reasons:

First, because Li Shimin has a heavy army. Li Shimin has been fighting with Li Yuan for a long time, has made great achievements, has a very high prestige in the army, and also has a group of generals to support him. If Li Yuan rashly mobilizes his troops, I am afraid that he will not be able to kill Li Shimin at all, but will bring himself to death.

The second is because if Li Shimin also dies, there will be no one to inherit the throne. It is said that after Li Yuan became the monarch, he designated his eldest son Li Jiancheng as the crown prince according to tradition, but Li Shimin is an ambitious person, he has led troops to fight for a long time, and his ability is far better than Li Jiancheng, and his military exploits are not comparable to Li Jiancheng. Therefore, when Li Shimin learned that Li Jiancheng was made the crown prince, he was very unconvinced, and at the same time, Li Jiancheng was also very jealous of Li Shimin, after all, he held military power and could directly threaten his position.

Li Jiancheng is also a ruthless person, he is determined to strike first and kill Li Shimin, but Li Shimin has already received the news, so he led people to launch the "Xuanwumen Change" and kill Li Jiancheng and Li Yuanji. Although Li Yuan has more than 20 sons, there are only three sons-in-law: Li Shimin, Li Jiancheng, and Li Yuanji.

The third is because Li Yuan and Li Shimin are father and son after all, and Li Yuan does not want the father and son to meet each other, which makes future generations laugh. Li Yuan was very angry when he learned that Li Shimin had killed his brother with his own hands, but he also felt very sad about it, and he killed each other, which was the most tragic thing in heaven and earth. In fact, Li Yuan also thought about transferring troops to suppress Li Shimin, but no matter who he or Li Shimin won, it will be a lose-lose situation.

It was precisely because of these reasons that Li Yuan did not transfer troops to suppress Li Shimin.