What is Cao Cao's joke about Guan Yu's red hare?

The reason is that Cao Cao is a very talented person. Cao Cao is welcome to a brave general like Guan Yu! The Central Plains is still in chaos, and Cao Cao's strength in the north can't compete with Yuan Shao, but Cao Cao and Yuan Shao will eventually have a battle. At this moment, Cao Cao also needs a lot of talents to work for him. Besides, as early as the alliance of governors, Guan Yu was famous for beheading Hua Xiong alone, and Cao Cao definitely wanted to have him. After Cao Cao owned the red hare, he began to use it to lure Guan Yu to work for him. Who knows that Guan Yu is a loyal man, and Cao Cao has nothing to do with him. But at this time, Yuan Shao sent troops to attack Xuchang. Two generals of Cao Cao were both killed by Yan. Faced with the crisis, Cao Cao had to appoint Guan Yu, who killed Yan Qiu without great trust. In the background at that time, Cao Cao had to use this horse to let Guan Yu play.

Guan Yu, one of Liu Bei's three brothers, was one of the best figures in the Three Kingdoms period. As early as the yellow turban insurrectionary uprising, Liu Bei joined the imperial army with him to pacify the opening angle. Later, he opposed Dong Zhuo and killed Hua Xiong, which made him famous. Guan Yu's character is also very loyal, because after his brother got separated, he was taken in by Cao Cao, but he still didn't forget his brother. Under the temptation of Cao Cao, Guan Yu did not forget Liu Bei's kindness. In this case, Cao Cao loved Guan Yu even more.