Living in the same room with two beautiful sisters in law , why did Cao Cao let Guan Yu do this?

Because Cao Cao wanted Guan Yu to do something unseemly, so that Guan Yu would have no face to face Liu Bei and choose to stay by his side.

Cao Cao did this to sabotage the relationship between Guan Yu and Liu Bang. Cao Cao deliberately did this in order to let Guan Yu follow him, so that Liu Bang felt that Guan Yu was cuckolding him, and there was a rift between the two.

The main thing is to lose Guan Yu's reputation, damage Guan Yu's reputation, and then pull Guan Yu into his account.

Cao Cao wanted to test whether Guan Yu was truly loyal, and then Guan Yu stood guard outside the door of the two sisters-in-law, this behavior moved Cao Cao, so Cao Cao tried his best to keep Guan Yu.

Because Cao Cao wanted Guan Yu to break the ring, so that Guan Yu would not have the face to go back to Liu Bei again, so that he would stay in Cao Cao's camp with all his heart.

I think it's because Guan Yu's reputation is very good, and Cao Cao is afraid that he will rebel against him and use this behavior to slander his reputation, so that he is no longer tolerated by others and can only rely on himself.

Because Cao Cao did this to ruin Guan Yu's reputation, so that he had no way to see Liu Bei again, so as to surrender himself.

Cao Cao did this to humiliate Liu Bei and at the same time sow discord between Guan Yu and Liu Bei.

Background of passing five levels and killing six generals: Liu Beijun was defeated by Cao Cao, and Liu, Guan, and Zhang were separated. Among them, Guan Yu was surrounded by Cao Cao's army.

Cao Cao admired Guan Yu's talent and heroism very much (the Battle of Tiger Prison Pass, Guan Yu Wenjiu beheaded Huaxiong, the three British battles Lu Bu, Guan Yu left a deep impression on Cao Cao), Cao Cao hoped to surrender Guan Yu, so he sent Zhang Liao and Zhang Wenyuan to lobby Guan Yu, Guan Yu out of his oath to his brother Liu Bei, as well as to protect his brother and sister-in-law from being violated and friendship with Zhang Liao, agreed to temporarily surrender to Cao Cao, but put forward several requirements: first, to surrender to Han and not to Cao; the second is to ensure the safety of brother and sister-in-law; The third is that if there is news about Liu Bei, he must leave immediately, and Cao Cao cannot stop him.

Cao Cao loved talent so much that he had to agree, hoping to influence Guan Yu's sincerity through his own efforts. In the days when Guan Yu "surrendered" to Cao Cao, Guan Yu received extremely high treatment and was named the Marquis of Hanshou Pavilion, with gold on the horse and silver on the horse, and was given the "Red Rabbit Horse". Guan Yu did not repay Lu for telling him, and he made great contributions to the ugliness of Yan Liang and Wenwen.

Before passing five levels and killing six generals, kill Yan Liangwen and ugly