First of all, Liu Bang didn't kill Fan Kuai out of personal hatred. Fan Kuai was a butcher in his early years, and Liu Bang was his old customer. They had a good relationship. Later, Liu Bang became Pei Gong and Fan Kuai became his adjutant.
Fan Kuai, far from being clever, seems to be the only one who can boast. At that time, the number of heads was used as the promotion standard. Fan Kuai cut off fifteen heads of the enemy in a battle and was named as a national doctor. And Zhang Han's army, cut off the heads of 23 people. Defeat Li You, son of Reese, behead 16 steps. When attacking Wuguan to overlord, Fan Kuai even killed a surname with ten heads. In the scene of the Hongmen Banquet, he broke into Xiang Yu's camp with a sword and shield, and knocked down the soldiers with halberds with his shield. After the account, he stared at Xiang Yu with his eyes. Xiang Yu also appreciated that he was a strong man and invited him to eat a pig leg. Fan Kuai drew his sword and cut the meat. Finish the meat in a minute. This show of eating raw meat actually saved Liu Bang's life? If Fan Kuai hadn't charged Xiang Yu, Liu Bang would have been killed.
After Liu Bang proclaimed himself emperor, Fan Kuai still worked for him. He put down the rebellion of the Yanwang Zangcha, and together with Zhou Bo put down the rebellion of Dai Di. Until twelve years before the death of Emperor Gaozu (BC 195), Liu Bang was still fighting the rebellion of Lu Wan, the prince of Yan, in the north.
So Fan Kuai's military capability is beyond doubt? However, this is what Liu Bang is most worried about.
Why? Because Liu Bang was most worried about the safety of Miracle and his son Liu Ruyi, in his view, if Miracle could not sue Lv Zhi, he would be killed by Lv Zhi. And to do this, we must make Liu Ruyi a prince and succeed to the throne. However, Liu Bang found that all officials were very popular with Lv Zhi's son Liu Ying, especially Fan Kuai, who held the relieving power. Once he decided to abolish Liu Ying, and even said that he would kill Lv Zhi. Will Lujia rebel? Will Fan Li help Lujia?
In Liu Bang's view, this question is affirmative. Fan Kuai's wife is Lv Zhi's sister Lv Qi, and Fan Kuai listens to her very much. Therefore, to save the lives of Liu Ruyi and Miracle, we must abolish or kill Lv Zhi, and to solve Lv Zhi, the premise is to make Fan Kuai disappear.
But Liu Bang couldn't make up his mind until he was dying. He found Chen Ping, asked Chen Ping to send a letter to Fan Kuai's army, and hid the frequency of the military attache in the car. He planned that Fan Kuai would behead him as soon as he arrived at the barracks, and let frequency take over the army.
But the problem is that Chen Ping is a very calculating person. He found the situation wrong. Liu Bang may die soon, and Lv Zhi must take power after his death. At that time, if Chen Ping and frequency report Fan Kuai's head, wouldn't it be a seasoned road?
So in the end, Chen Ping didn't kill Fan Kuai. Instead, take Fan Kuai to the prison van and take him back to Chang 'an. As a result, he got the news of Liu Bang's death halfway. Chen Ping immediately changed direction and went to Lv Zhi. Fan Kuai's saving his life became his achievement.
When Liu Bang failed to kill Fan Kuai, Lv Zhi was fine, Lv Zhi was fine, and Miracle and Liu Ruyi were fine.