First of all, Liu bang followed the advice of his subordinates and closed the palace door, not greedy for money. In 207 BC, Liu Bang led an army into Guanzhong, and the army led by Liu Bang arrived in Bashang, which was only a few tens of miles away from Xianyang, Qin Dou. Zi Ying, the king of Qin, saw that the tide was over, so he surrendered to Liu Bang in Kaesong.

After Liu Bang entered Xianyang, he looked at the luxurious palaces and countless gold and silver jewels, and his heart began to swell. Isn't it a good day for everyone to fight Qin together? Now the good times are close at hand, at your fingertips. No matter who it is, everyone will be moved, and Liu Bang is no exception. However, just as he was about to live in a luxurious palace and begin to enjoy happiness, Sean's advice made his reason overcome his desire. I ordered people to close the palace gate, not greedy for money and pleasure, until Xiang Yu accepted it.

The reason why Liu Bang can be so rational and control his own desires is absolutely not small. All this was seen by the shrewd Fan Zeng, who also realized that Liu Bang's ambition must be the enemy of Xiang Yu in the future. So I want to kill this future threat when he was young with the Hongmen banquet.

Secondly, Liu Bang abolished Qin Law and made three chapters. After Liu Bang entered the customs, in order to win the hearts of the people and stabilize the situation, the elders and heroes of the counties in the customs gathered together and solemnly declared to them: "Qin's severe punishment and harsh laws have harmed the people all over the world and should be abolished." After that, he agreed with everyone that no matter who he is, he must abide by the three laws.

These three rules are: the murderer should be put to death, the injured should make amends, and the thief should be convicted! Both elders and heroes expressed their support for the three chapters of the contract. Because of the firm implementation of the three chapters of the contract, Liu Bang won the trust, support and support of the people and won the hearts of the people. Liu Bang's act of buying people's hearts also made Fan Zeng very afraid, which strengthened his determination to get rid of Liu Bang.

Finally, Liu Bang lowered his posture and took the initiative to show good. As the saying goes, a gentleman can bend and stretch. Liu Bang is not a straightforward person. What he knows best is that he can read and feel, bend and stretch. He didn't confront Xiang Yu head-on, but lowered his posture and took the initiative to make amends, showing his goodwill towards Xiang Yu. Such a patient person will succeed in the future.

So Fan Zeng is really anxious to get rid of it, for fear of becoming an opponent of Xiang Yu in the future. So he wanted to kill Liu Bang at the Hongmen banquet, instead of playing along. Because of these three things that Liu Bang did after entering the customs, Fan Zeng was terrified, so he set up the Hongmen banquet.