Although Zhuge Liang was suspicious, he was not as suspicious as Cao Cao and Sima Yi. Cao Cao had an attitude of not doubting people without employing people. He is no less suspicious than Cao Cao. Cao Cao was cautious no matter what because of his suspicion. Zhuge Liang listened very much to his master Liu Bei, so sometimes he became less cautious, which led to the loss of the street pavilion. Sima Yi was very cautious and stayed with Cao Cao for thirteen years but did not let Cao Cao Bu Bu thought carefully about killing Cao Cao and his son before he fully took over power after the death of Cao Cao and his son.