Sima Yi is good at strategy, especially keeping a low profile. When the situation is unfavorable to him, he plays the fool on the surface, giving people the illusion of inaction, thus covering up his talents and ambitions, paralyzing the enemy, secretly accumulating strength, waiting for the opportunity, and realizing his ambitions.

At the end of the Western Han Dynasty, hundreds of males competed for deer. Cao Cao likes to hire counselors. Cao Cao heard that Sima Yi was resourceful and decisive, and wanted to ask him to be an official. Seeing the decline of the Han Dynasty and the rule of Cao Cao, Sima Yi refused to go on the pretext that he was suffering from wind-induced arthralgia (wind-induced limb pain or numbness) and his daily life was difficult.

Cao Cao didn't believe it, so he sent someone disguised as an assassin to inquire. In the middle of the night, Sima Yi saw someone break into his bedroom and stab him with a sword. He was shocked, but immediately realized that it must be someone sent by Cao Cao. So he lay in bed, motionless at the mercy of the assassin. Seeing this, the assassin concluded that Sima Yi really suffered from wind arthralgia. He put away his sword and went home to tell Cao Cao.

But Sima Yi can't stay in bed all his life, so he pretends to be better and becomes active. Cao Cao was still thinking about Sima Yi, asking about his recovery and sending messengers to invite him out of the mountain.

Sima yi thought. If you refuse again and again, I'm afraid there will be a catastrophe. Now the situation is all in Cao Cao's hands. So Sima Yi took the emissary to Cao Cao and won the favor of Cao Jia.

As time went on, Cao Cao, who was proficient in personnel, soon realized that Sima Yi might be an ambitious man and would not keep his position under others for a long time, so he began to look at him with suspicion. Sima Yi is also a shrewd man. He immediately noticed the change of Cao Cao and began to care about the little things in daily life. He pretended to be short-sighted and ambitious. In addition, he boasted in front of Cao Cao's son Cao Pi to show his protection. Cao Cao was once again deceived by Sima Yi and never attacked Sima Yi until his death. But before Sima Yi died, Cao Cao asked Cao Pi to defend Sima Yi.

Cao Shuang had no ability and no idea, so he surrendered. A few days later, Cao Shuang and his gang were charged with treason. Sima Yi killed Cao Shuang and all his entourage, and executed three people.

After the change of Gaopingling, Sima Jiacheng became the actual controller of Wei State. Later, his grandson Sima Yan abolished the Wei Emperor and established the Jin Dynasty.