Xiang Yu and Liu Bang were both Haojie at that time, but Xiang Yu's strength was stronger than Liu Bang's, in Xiang Yu's eyes Liu Bang was not worth mentioning, but in Fan Zeng's view, Liu Bang could not be underestimated, Fan Zeng had told Xiang Yu twice, the first time he said to Xiang Yu: "I let people give Liu Bang a look, his qi is like a dragon and a tiger, this kind of person can not stay, otherwise there will be endless troubles in the future", but Xiang Yu did not listen at all, the second time Fan Zeng said: "Liu Bang was greedy and lustful, and today he entered Hangu Pass, but he did not commit any crime, so it can be seen that his ambition is not small, and now he will not destroy him." In the future, there will be endless troubles", as a result, Xiang Yu still did not listen to Fan Zeng's words, and later at the Hongmen banquet, Xiang Yu had the opportunity to kill Liu Bang, but Xiang Yu was slow to move, so he let Liu Bang run, so why didn't Xiang Yu kill Liu Bang?
The first point of view: In fact, people who hope for qi have long given Liu Bang a long time ago, knowing that Liu Bang will become a great instrument in the future, and if he does not get rid of it now, he will not be able to get rid of it in the future, and Xiang Yu has long known that he may be an enemy of Liu Bang in the future, but because Xiang Yu despises Liu Bang, he did not put Liu Bang in his eyes at all, what is the reason? It is because Xiang Yu is known as a ten thousand enemies, he is very capable of fighting, knowing that no one in the world is his opponent, it is a kind of conceit, so he feels that Liu Bang is not his opponent, because at the time of the Battle of julu, 400,000 Qin troops were not his opponents, he led 40,000 people to kill the Qin soldiers on horseback, many princes saw the situation and knelt down to meet Xiang Yu, it can be seen how strong Xiang Yu is, so in Xiang Yu's eyes Liu Bang is not worth mentioning at all, killing or not killing is the same, it is only a matter of time, now it does not matter if you do not kill, now it does not matter, Kill them in the future.
The second point of view: Xiang Yu did not kill Liu Bang is actually a kind of great wisdom, is a kind of great wisdom to consider the problem from the overall situation, if liu Bang just because Liu Bang occupied a little territory and killed Liu Bang, it will inevitably not make other princes feel cold, and finally only let other princes rebel, just like Liu Bang in his later years, a group of courtiers were talking about it, Liu Bang ran to ask Zhang Liang: "What are they doing?" Zhang Liang said: "They are discussing rebellion" Liu Bang said: "Then what should I do?" Zhang Liang said, "Whoever you usually hate the most, make him king, so you'll be fine." Later, Liu Bang obeyed Zhang Liang's plan to seal that person as king, this person is Yongya, and later many people heard that he was crowned king, and they were no longer afraid, because they all knew that Liu Bang hated him the most, he was all right, and the other people were all right, the same reason, if Xiang Yu killed Liu Bang at that time, then the other princes would also endanger themselves, and finally go to the road of rebellion, so Xiang Yu considered it from this point of view, so he did not kill Liu Bang at that time.
The third point of view: Liu Bang and Xiang Yu are brothers, if they kill their brothers because of the point of turf, it will inevitably make the people of the world laugh in shame, and Xiang Yu will not do that because Xiang Yu wants this face very much, so Xiang Yu will not do that. But did Xiang Yu really regard Liu Bang as a brother? I don't think so, Xiang Yu only superficially regards Liu Bang as a brother, and in his heart he looks down on Liu Bang at all.
The fourth point of view: Xiang Yu's subordinate Hongmen banquet, is to see how Bold Liu Bang is, the result liu Bang really came, Xiang Yu at the beginning wanted to kill Liu Bang, but Liu Bang's subsequent performance made Xiang Yu give up this idea, because Liu Bang's performance was low three or four, just like the emperor of the film, making Xiang Yu feel very comfortable, Liu Bang repeatedly gave in, Xiang Yu finally felt that this kind of person is difficult to become a big instrument, so he quit killing and let Liu Bang go, just like Cao Cao also wanted to kill Liu Bei, so he invited Liu Bei to dinner When Cao Cao said, "Today's hero, only the ambassador and the ear", Liu Bei was first shocked, and then he used the thunder to get the chopsticks to the ground, and as a result, Cao Cao took a look and knew that Liu Bei was not a person with courage, so he let Liu Bei go. And Liu Bang is also like this, repeatedly backing down, making Xiang Yu feel that this person is not enough to worry about.
In the end, Xiang Yu spared Liu Bang, and the result laid the groundwork for his own defeat, Liu Bang defeated Xiang Yu in the Chu-Han War, and When Liu Bang besieged Xiang Yu with a large army, he issued an order, that is, "Whoever can get Xiang Yu's first rank, who can be crowned marquis", so all the generals went into battle, killed Xiang Yu, and finally began to snatch Xiang Yu's body, because there were more than thirty people who snatched Xiang Yu's body, which shows Liu Bang's resentment towards Xiang Yu.