Why did Xiang Yu invite Liu Bang to dinner?
Xiang Yu was the most powerful and well-deserved eldest brother at that time. Although Liu Bang is not as strong as Xiang Yu, he is not too weak and unstable. Fan Zeng considers himself "ambitious". Liu Bang had a steward named Cao, who secretly reported to Xiang Yu: "Liu Bang refuses to obey you and is going to rebel." And Liu Bang often steals the limelight from Xiang Yu. For example, when he first attacked Xianyang, Xiang Yu wanted to punish him. Fan Zeng was a wise man. He thinks that Liu Bang's failure to do this is absolutely a disaster. So Xiang Yu sent a letter to Liu Bang, saying, Come, brother, invite you to dinner. Xiang Yu should mean calling here first to see if he can get it. If he refuses to accept it, he will be punished immediately, and Fan Zeng must get rid of Liu Bang. Knowing that Xiang Yu could not be beaten, Liu Bang went with people and jewels, and then pretended to be a grandson, called his brother and gave gifts. Embarrassed, Xiang Yu wanted to let Liu Bang go, but Fan Zeng didn't agree, so he had a sword dance in Xiangzhuang, which was intended to repeat itself. Finally, Liu Bang ran away while going to the toilet, mainly because of such a story.