After Liu Bang led his brothers to revolt, he followed Xiang Yu's army because he couldn't become a climate by himself. Because Liu Bang went with his brothers at that time, it was a gang, and Liu Bang was the leader of the gang. Xiang Yu and his gang were certainly kind to Liu Bang, and Liu Bang was eloquent, so they quickly won the respect of Xiang Yu, and they also became brothers of the opposite sex. At that time, they had to have a certain relationship to become real brothers, so their feelings should be deep.
No matter what their purpose is, the fact is that they are indeed brothers. When Chu and Han contended, Xiang Yu arrested Liu Bang's father and threatened Liu Bang to cook his father before the war. Seeing this scene, Liu Bang was very calm and responded that when you cook, remember to give me a share. You and I used to be brothers, so my father is your father. Now you always cook your own father, so what can I do? I'll share a piece of the action and share the responsibility with you.
I have to say that Liu Bang is really smart. Having said that, Xiang Yu stopped threatening him with his father. It seems that Xiang Yu still admitted his brotherhood with Liu Bang. The intersection of Han Xin and Xiang Yu, in addition to joining the Chu army in the early days, is the encirclement of Xiang Yu as a general of Liu Bang. Therefore, Xiang Yu's feelings for Liu Bang are still relatively deep. After all, where is the name of a brother?