There is something wrong with the answer of Zhang 5 152257. It should be that Cao Cao died before the official start of the Three Kingdoms. Cao Cao is not the emperor of Wei, but Wang Wei.
Sima Yi, Sima Shi and Si Mazhao were also wrong. He died before the reunification of the Three Kingdoms.
General Zheng's answer is correct. But there is something wrong with his Baidu name During the Three Kingdoms period, the titles of generals were general title, general title and general title. And a title of generals in ancient times general Zheng is neither fish nor fowl.