Cao Cao began to ask me for fortune telling.

Cao can be said to be a lean man, who not only survived in troubled times, but also occupied a whole country. Not only that, he also has many generals and many advisers who conspire with the world. It can be said that Cao Cao is the overlord of the Three Kingdoms. In the face of another dark horse, Sima Yi, Cao Cao did know his talent, but Wei was not unified, so Sima Yi was not executed at that time. So Sima Yi will grow, and eventually the Sima family will replace Cao Shi Jiangshan.

Guo Jia had already seen that Sima Yi was ambitious and ambitious. So when he died, he told Cao Cao that Sima Yi was a man with lofty ideals, and he would be dangerous to Wei, so he needed to be killed to avoid future troubles.

Later, Cao Cao really moved to kill Sima Yi. But when Sima Yi felt something was wrong, he immediately made up his mind with Cao Cao not to rebel and had no intention. This made Cao Cao release Sima Yi.

When Cao Cao was alive, although he didn't kill Sima Yi, he was wary of him everywhere and suppressed him, and he wouldn't reuse Sima Yi. Sima yi, on the other hand, has always kept a low profile, being cautious and not showing ambition.

Until Cao Cao's death, his son Cao Pi was also warned to beware of Sima Yi. Xelloss did exactly as Cao Cao said at first, but Sima Yi was a wily man, who repeatedly made meritorious military service and reassured Xelloss. Xelloss put down his doubts about Sima Yi. Finally, Sima Jia rose slowly and became the overlord.

Therefore, Cao Cao knew Sima Yi's ambition for a long time, so did Xelloss and even his grandson Cao Cao. It was only when Cao Cao arrived that Sima Yi was completely unable to stop it. In the Cao Cao era, Sima Yi was restrained and saved himself.