It is said that Gou Jian can endure and Liu Bei can endure, but the "ninjutsu" of the two of them is not as good as Sima Yi, who is the strongest "ninja" who can endure in history. Sima Yi liked to raise turtles, and this turtle also saved his life, so everyone called him the "Teenage Mutant Ninja Turtle".
Sima Yi endured three generations of Cao Wei's regime, endured for a lifetime, and finally broke out, usurping Cao Wei's jiangshan.
Some people shouted when they were a little wronged, they couldn't stand it, you may not know how much Sima Yi suffered, he endured it all his life, broken teeth swallowed into his stomach, and swallowed it for a lifetime.
When Cao Cao first used Sima Yi, he saw that Sima Yi was the face of "eagle looking at the wolf", which referred to people with rebellious intentions, and Cao Cao thought that Sima Yi would rebel, so he always put him up and suppressed him.
Before Cao Cao died, he told Cao Pi that you must beware of Sima Yi and kill him if necessary. Cao Pi nodded in agreement, but Cao Pi did not kill him because he needed Sima Yi.
Before Cao Pi died, he told Cao Rui that Sima Yi would rebel, and you must be wary of him, Cao Rui nodded and agreed, but Cao Rui did not kill him, so he needed Sima Yi.
At this time, the Cao clan and the Xiahou clan were no longer able to do so, and after Cao Zhen's death, the Cao family had no generals. Zhuge Liang kept on the Northern Expedition, and the Cao family could not stop Zhuge Liang, so Cao Rui could only rely on Sima Yi.
If Cao Rui killed Sima Yi, it would be tantamount to self-destructing the Great Wall, Sima Yi died, and Zhuge Liang reached Chang'an in minutes. For Sima Yi, Cao Rui used it on the one hand and defended it while achieving a balanced state.
Cao Wei's territory was close to the north, and in addition to defending against the Shu and Wu states, it also had to defend against the nomadic peoples in the north. In the first year of the Reign of Wei Jing (237 CE), Gongsun Yuan, the Taishou of Wei Liaodong, betrayed the State of Wei and established himself as the King of Yan and exercised autonomy.
Cao Rui certainly did not agree, so he sent Sima Yi to quell the chaos. Sima Yi was an old jianghu, and he killed Gongsun Yuan in three strokes and five divisions, and put down the rebellion. Liaodong is located in the northeast, the climate is very cold, and Sima Yi's time to quell the chaos is the first month, it is the cold time.
Cao Rui also couldn't bear to see the soldiers frozen, so he sent them cotton clothes and let them wear them for the winter.
However, after the cotton clothes were handed over to Sima Yi, he did not distribute them to the soldiers, but put them away, seeing that some of the soldiers had frozen to death, Sima Yi was also indifferent, and he froze to death.
Many people do not understand why Sima Yi did this? In fact, this is where his cleverness lies. Cao Rui was wary of Sima Yi, and he knew this, so he was always careful. How can we reduce Cao Rui's suspicion of him?
Sima Yi had a conflict with the soldiers, causing the soldiers to hate him and hate him. What Cao Rui wanted to see most was that Sima Yi and the soldiers were at odds, so that he could rest assured. If the soldiers and Sima Yi had the same heart and were loyal to him, Cao Rui was very afraid, and if Sima Yi rebelled, it would be bad.
Cao Rui was very happy to see Sima Yi do this, and to see the soldiers hating Sima Yi's eyes. Sima Yi used the art of self-defilement to dispel Cao Rui's suspicion of him, but his heart did not think so, and he was still worried about the one acre and three points of Cao Rui's family, but he had deceived Cao Rui.
After 11 years, Sima Yi finally revealed his true face, and he launched the "Gaopingling Rebellion", successfully usurping the Cao family's Jiangshan and changing the Jiangshan from the Cao family to the Sima clan.
At this time, people reacted, it turned out that Sima Yi had been pretending, he was so shrewd, he had hidden from all the people.
References: Romance of the Three Kingdoms, Book of Jin, Zizhi Tongjian, etc