After reading Xiang Yu's sub-seal picture, it can only be said that he is either too arrogant or too ignorant
In fact, some people don't understand the background at that time. First, at this time, it had only been more than ten years since Qin destroyed the Six Kingdoms, and everyone wanted to rebel against the tyrannical Qin and restore the original feudal system, which was the general background at that time. After the failure of Chen Sheng and Wu Guang's uprising, the relay was all the nobles of the original countries.
The second Xiang Yu was only one of the rebel army, and at that time, there were two offensive directions, Liu Bang was the boss in the west, and Zhang Han's army in the north, Xiang Yu was only a deputy general. Xiang Yu was the default commander after killing the main general and leading the troops to win the Battle of Julu. At this time, because of Xiang Yu's ability, he became the default alliance leader of all bosses. At that time, they also had a co-lord King Chu Huai above their heads. Xiang Yu's own descendants are not many in number.
After the Hongmen banquet, it is equivalent to Xiang Yu relying on his prestige and performance to rob Liu Bang of the credit, after all, what he started to say was who entered Xianyang and who was the king, but Liu Bang didn't dare to offend Xiang Yu.
Xiang Yu killed the puppet of King Chu Huai again, and became the overlord of Western Chu and presided over the sealing ceremony. Basically, the original territory of each country is divided into the original people. Xiang Yu's territory was originally the Chu State, but it was still the richest region at that time.
This time, Xiang Yu was mainly assigned to live or take precautions, one was Liu Bang, and he went to Hanzhong, and also hired Sanqin as a surveillance force. The other one is Qidi. In the end, it was these two forces that led the way
But how to say it, maybe there are many objective problems like the above that cause him to not be able to play reunification right away, but looking at Xiang Yu's sub-seal diagram, I feel that he is just rushing to restore the situation of the Warring States and the heroes standing side by side, which Liu Bang won completely.