Cao Cao was originally an official of the Eastern Han Dynasty court, and step by step he laid down his own territory, blackmailing tianzi to order the princes to pacify the north and the central plains. But throughout his life, he also failed to defeat the two major forces of Shu Han and Eastern Wu. Why can't Cao Cao defeat the world? Only Sima Yi understood Yang Xiu's words before he died.
Yang Xiu was a talent under Cao Cao, but was accidentally killed by Cao Cao because of his speech. At that time, Cao Cao was stationed at the front line, but the attack would not have any good results, and he was not willing to retreat, and he was in a dilemma, at this time it was necessary to formulate a night password, Cao Cao was drinking chicken soup at the time, casually saying chicken ribs. After Yang Xiu learned of this, he ordered the people around him to pack up their things and prepare for the march, saying that Cao Cheng xiang was going to withdraw his troops.
Cao Cao went out to inspect, saw that many people were packing their bags, was surprised, heard that Yang Xiu said to retire, Cao Cao was furious, he has always hated others to speculate on his thoughts, and people as smart as Guo Jia would never talk about Cao Cao in front of outsiders. So Cao Cao ordered Yang Xiu to be killed, and Before Yang Xiu died, he said: I insisted that I would die late, which shows that he already knew that he was going to be killed by Cao Cao.
Although in the eyes of others, Yang Xiu lamented that he died a little late, but this word entered Sima Yi's ears and made Sima Yi learn from then on. Although Cao Cao likes talents, he does not want someone to be smart, especially not to like others to see through his meaning, that is to say, he must restrain himself around Cao Cao and cannot say anything.
Therefore, Sima Yi's political career after that has always been to dress up as a pig and eat a tiger, leaving a hand in everything, although it did not help Cao Cao to lay the world, but also made a lot of merit. Even so, he was repeatedly suppressed by Cao Cao, who used Sima Yi while fighting, and suppressed it very well. It was not until after Cao Cao's death that Sima Yi really rose up and gradually usurped power.