Why are Cao Cao, Cao Pi, and Cao Rong all smart, but they don t get rid of Sima Yi to prevent future

Because Sima Yi is also very smart, he did not expose his ambition prematurely, and did not expose his ambition until the end.

If Sima Yi is not eliminated, it is to achieve mutual checks and balances, whether it is against Zhuge Liang's Northern Expedition or the attack of Eastern Wu, if Sima Yi is eliminated, it is likely to lead to the internal ** of Cao Wei, which will bring opportunities to Shu Han and Eastern Wu.

Because Sima Yi was smarter than them and used Zhuge Liang and other opponents to escort him, he was not eliminated in the end.

Because at that time, Sima Yi had not yet shown his antipathy. They were confident that Sima Yi would not rebel and never took him seriously.

Can you get rid of it? I guess you're fluttering.

Zhuge Liang led tens of thousands of troops to leave Xiegukou and sent envoys to Eastern Wu, hoping that Sun Quan would attack Wei at the same time. This was Zhuge Liang's fifth Northern Expedition to the Central Plains, and it was also his last attack on Cao Wei. Sima Yi thought:"If you are a brave man, you should walk east along the mountain road.

If you climb Wujoyuan to the west, there will be nothing to do"。Therefore, he led the Wei army to establish a camp in the last battle. He wanted to consume the food of the Shu army again in a protracted war, so he ordered the Han army to retreat on its own.

In August of the same year, Zhuge Liang fell ill due to overwork, and his condition became more and more serious. When the news of Zhuge Liang's serious illness reached Chengdu, Liu Chan sent Li Fu to visit Zhuge Liang and ask him about the future of Shu Han.

<> Zhuge Liang did not let Wei Yan participate in the deployment, but let Yang Yi and Fei Yi lead the team to retreat. Wei Yan and Jiang Wei were responsible for terminating the empress, which led to a fight between Wei Yan and Yang Yi. It didn't take long for Zhuge Liang to die in the barracks.

However, Yang Yi and Jiang Wei followed Zhuge Liang's deathbed plan to keep order in their troops and retreat calmly. Sima Yi thought that Zhuge Liang had fallen, and led his troops to pursue. Jiang Wei beat the drum and passed the flowers, forming an offensive.

Sima Yi did not dare to attack, so the Shu army retreated calmly and entered the valley. So, here comes the problem. After Zhuge Liang's death, Sima Yi wanted to take the opportunity to attack Shu.

In the later Wei period, the power of the Sima family went to the opposite side, and Cao Cao's descendants became puppets. After Sima Yi launched the Gaopingling Rebellion, Cao Cao's descendants became inferior. In Cao Cao's time, Sima Yi knew how to forbear.

But after Cao Ei's death, Sima Yi's ambitions gradually came out. Since then, Sima Yi has stopped being patient. Although Cao Shuang is a descendant of Cao Cao, his means are very poor and he can lead troops to fight.

In the early days of Cao Ei's administration, Sima Yi was already full of ambitions, but at that time Sima Yi was not Cao Ei's opponent. At the same time, under the circumstances of the time, Cao Wei did not allow Sima Yi to carry out a coup d'état. After Cao Rong's death, after the little emperor Cao Fang succeeded to the throne, the political struggle between the Cao family and the Sima family became more and more intense.

Cao Yi is very smart and has a very strong ability to make Sima Yi dare not rebel. He is very loved by the people. After he ascended to the throne, the life of the people Chun Sou became much better, so Sima Yi had no chance to rebel.

Cao Rong is more powerful than Qiao Hui, his father Cao Pi and grandfather Cao Cao, and the way of doing things is also different.

In order to protect his life, Sima Yi is no longer high-profile, and he is also trying to avoid court disputes.

Sima Yi has great ambitions, but he can't show that he is a villain on the surface, and he has a strong strength behind it.

Cao Cao can't, Cao Pi didn't expect it, and Cao Ei is powerless.

1. Cao Cao couldn't kill Sima Yi. Second, Cao Pi didn't expect that Cao Ei couldn't do it. By Cao Ei, the situation has changed, although their old Cao family is the emperor, but in fact, the power has been dispersed, and the scholars have become the backbone.

And most of these scholars support the Sima family, even if Cao Yi wants to deal with Sima Yi, he can't do anything.

Cao Cao was because Sima Yi's wisdom was useful to the Wei state. Cao Pi is because Sima Yi can contain Zhuge Liang. Cao Rong did not dare to kill him because Sima Yi held military power.

Cao Cao loves talents, at first Cao Cao wanted to take Sima Yi under his command, and later gave Sima Yi to Cao Pi as a staff member, Cao Pi would ask Sima Yi's opinion in many places, it can be seen that Cao Pi trusted Sima Yi more, and when Cao Yi was in power, although he was very jealous of Sima Yi, even if he wanted to get rid of him, he had to use Sima Yi to fight against Zhuge Liang.

Because they feel that Sima Yi is a makeable material to assist them, Sima Yi also knows how to keep his eyes dirty, does not show his ambitions, and is conscientious, so he has always been reused.

Because Sima Yi did not reveal that he wanted to rebel at the beginning, and Cao Pi trusted him very much, Cao Yi died relatively early, so he did not kill Sima Yi.

Because Cao Cao knew that without Sima Yi's help, Cao Pi would not be able to become a great weapon, and the Wei state he established would definitely be defeated by Eastern Wu and Shu Han.

Because Sima Yi is a very scheming person, he is very capable and has his own ways and methods of doing things, so he will let Cao Pi reuse him before he dies.

Because Sima Yi was indeed capable and able to suppress other forces in the court, Cao Cao would let Cao Pi continue to use him and teach Cao Pi how to control Sima Yi.

Because Cao Pi took a fancy to Sima Yi's talent. Although he has been reused, he is also being used.

Because Sima Yi is very talented, Cao Pi wants to use his hands to do something that he can't do, so as to fulfill his dream.

Because Sima Yi's position is too critical, and many people are Sima Yi's cronies, they have to reuse Sima Yi.