Cao Shuang was a greedy person who was afraid of death, and he never thought of fighting with Sima Yi for your life and death. After the Gaopingling Incident, Huan Fan persuaded Cao Shuang to abduct Tianzi to Xuchang, and then mobilized various armies to recruit Sima Yi. But Cao Shuang hesitated, fearing that once he failed, there would be no way back. After dragging on for half a night, Cao Shuang threw the knife on the ground and said, "Even if you surrender to Sima Yi, you can still be a rich and noble family." Coincidentally, Sima Yi also pointed at Luo Shui and swore that he would not kill Cao Shuang, so Jiang Ji wrote a letter to persuade Cao Shuang, saying that Sima Yi would only dismiss his officials and would not kill him, and as long as he surrendered his military power, he would be able to save glory and wealth. As soon as Cao Shuang saw that Jiang Jidu had said this, he resolutely surrendered.
Sima Yi had already seen through the essence of Cao Shuang's paper tiger, the so-called "siege of the master must be que", and he had to leave a retreat for Cao Shuang so that he would not be desperate to take risks. At the same time that Huan Fan fled, two lobbyists sent by Sima Yi also arrived at Cao Shuang's barracks. These two lobbyists, one is Xu Yun, the waiter, and the other is Shang Shu Chen Tai. Sima Yi's meaning was clear: Cao Shuang had committed a serious crime and must be relieved of his official duties, but his life and title could be saved. In order to reassure Cao Shuang, Sima Yi sent Yin Da, who was Cao Shuang's most trusted person, and he swore with the god of Luoshui that Cao Shuang's life would not be violated.
When Sima Yi staged a coup d'état, Huan Fan disregarded his personal safety and defected to Cao Shuang. It was suggested that Cao Shuang let the Young Emperor drive to Xuchang and recruit soldiers and horses to quell the rebellion. Cao Shuang hesitated, and Huan Fan said to Cao Xi that today there is a young emperor who accompanies the world and orders the world, who dares not follow. But Cao Xi did not adopt it. The brothers' indecisiveness harmed themselves.
Before the Gaopingling Incident, Cao Wei's political atmosphere had not deteriorated, even if Cao Shuang was dissatisfied with Sima Yi, he was only entrusted with a high position, privately hoping that Sima Yi would die early, and did not say that he would kill him, so when Sima Yi sent someone to persuade Cao Shuang and also swore a poisonous oath, even Cao Shuang's younger brother Cao Xi persuaded his brother to compromise with Sima Yi, I think Cao Shuang's compromise in this situation is understandable, not stupid, he just did not expect "Cao Wei Zhuge Liang" Sima Yi to be so vicious and shameless.