Sima YiTaoguang yang obscured three generations of Cao Cao's grandchildren by hiding his ambitions, survived the death of a number of founding ministers, fraudulently earned Cao Shuang, launched the Gaopingling Incident to establish the sima clan dictatorship, and finally his grandson drew gourds in the same way, replaced Wei Jianjin, and unified the three kingdoms.
Therefore, it is not too much to say that Sima Yi is the most chicken thief in the Three Kingdoms. However, for Sima Yi's pre-emptive usurpation, we must consider both Sima Yi's loyalty to Cao Wei and cao Wei's distrust of Sima Yi.

During the Three Kingdoms period, it was recognized that the two most intelligent people were undoubtedly Zhuge Liang and Sima Yi, but from a military point of view, Zhuge Kongming was still a long way behind Sima Zhongda.
In fact, in the "Romance of the Three Kingdoms", we can feel Zhuge Liang's wisdom everywhere. However, in terms of the balance of the war and the gains and losses of interests, the State of Wei, as the representative of Sima Yi, did not fall behind in the slightest, but on the contrary, in Qishan repeatedly blocked Zhuge Liang's long-cherished wish to unify the Han Dynasty, causing him to die before he could succeed in his division, which was deeply regrettable.
But if you think about it, you have to admire Sima Yi's weakness in the war. Temporary weakness is not necessarily a bad thing, war is a major affair of the country, a major affair of the country, and what is wanted is something real, not a quick one. Sima Yi was obviously much more intelligent and pragmatic in this regard.
Because of orthodox morality, successive emperors have exaggerated Sima Yi's treachery and usurpation, one-sidedly reprimanded him for his disloyalty, without reflecting on Cao Wei's distrust of him.
Cao Cao advocated meritocracy, but in fact there was a premise, that is, no matter what kind of talent, it must be guaranteed to be used by me and controlled by me. Otherwise, we will want to get rid of it and then quickly. Cao Cao was secretly impressed by Sima Yi's great talent, but also deeply jealous, lest his children and grandchildren be able to control it. Cao Cao once reminded Cao Pi: Sima Yi is not a human subject, and will definitely interfere in your family affairs.
Cao Cao kicked Sima out of Xiangfu, and Cao Pi used him to promote him and make him a great general. Then cao rui demoted him to the border pass, and later heard rumors that he was demoted to his post, demoted to the old city (that is, his hometown), and abolished as a commoner.
This was the usual trick of emperor Cao Shi, fiercely straightening out, so that his life was hanging in a line, in order to sharpen his heart and watch his loyalty. Who is Sima Yi? It had long been expected that Kong Ming would go out of Qishan, and Cao's relatives would be defeated. He waited at home, waiting to be called to the edict. Finally, he waited, and then served as a general on horseback, leading the three armies to capture the street pavilion in one fell swoop and defeat the first Northern Expedition planned by Kong Ming.
Unfortunately, after the victory, he was dismissed from his post again by Cao Rui on the grounds that he had raised Kou and let Zhuge Liang go, and was placed under house arrest in the palace. At this point, Sima Yi was dismissed from his post for the third time, but he was still waiting for the opportunity, even if he was urgently summoned by the emperor, but the timing was not good, and he did not want to come out with little power. It was not until the governor of Dadu, Cao Da, was defeated and pretended to be ill that Sima Yi came out to serve as the governor of Dadu and took charge of military power. He held the key pass bitterly, and eventually through a protracted battle, dragged Kong Ming to death and defended the Wei Dynasty.
After Sima Yi eliminated Cao Shuang's forces, Cao Wei's military and political power completely fell into sima Yi's hands, laying the foundation for Sima Shi to replace Cao Wei. However, throughout his life, Sima Yi was still called Wei Chen, and he also repaid the friendship with the three dynasties of The Wei Emperor Cao Cao, the Wei Wen Emperor Cao Pi, and the Wei Ming Emperor Cao.
Therefore, looking at Sima Yi's life from this perspective, it is also inevitable to sympathize. Cao Wei eventually fell to Sima And perhaps that was what he did.
Sima Yi's transformation from a young man with lofty ideals and talents, to a prodigy with a worldwide reputation in internal affairs and military affairs, and then to a hero who governed the country and the world, this is entirely due to the fact that his life plan was perfect.
In every important opportunity period of his life, he can always grasp the best opportunity to shoot, and it is fruitful to grasp it, which is rare and valuable.
What is even more valuable is that he can endure: he can endure in the face of Cao Cao's discrimination and oppression; he can endure in the face of the exclusion and framing of his colleagues; he can endure in the face of Zhuge Liang's "humiliation of the towel"; he can endure in the face of the bullying of the junior Cao Shuang. The most brilliant highlight of his life plan is his "forbearance" - perseverance in order to achieve the ultimate success of his work.
A "forbearance" character runs through Sima Yi's entire life; a "forbearance" character creates the wolf Gu Zhimou, the first in the ages.