In the early years of the Western Han Dynasty, Liu Bang divided many princes, of which 7 were princes with different surnames. However, after completely defeating Xiang Yu, Liu Bang began to cut off the forces of the princes with different surnames, and 7 were abolished, 6 of which were abolished, but only the fiefdom of the king of Changsha was left.
We all know that Liu Bang's process of fighting the world is also quite difficult, in order to have the strength to confront Xiang Yu, Liu Bang vigorously co-opted the princes of Xiang Yu's camp, such as Yingbu, Wu Rui and others. At the same time, in order to further unite some important generals in his own camp, Liu Bang also divided them into princes, such as Han Xin and so on.
By the end of the Chu-Han War, the Western Han Dynasty had enfeoffed 7 princes with different surnames for various reasons, namely: Peng Yue the King of Liang, Han Xin the King of Chu, Yingbu the King of Huainan, Zhang Er the King of Zhao, Zang Di the King of Yan, Wang Xin of Han, and Wu Rui the King of Changsha.
Although the world has been nominally unified, the clear-eyed people know at a glance that this is a very embarrassing situation. Liu Bang was worried about the rebellion of the princes with different surnames, and the princes of different surnames were worried about when Liu Bang would destroy them, and finally these princes with different surnames, whether they were really rebellious or not, were to be eliminated by Liu Bang. It's just that the Western Han Dynasty has just been established, and all aspects are in ruins to be rebuilt, and Liu Bang can only maintain the status quo for the time being!
In 202 BC, King Zhang Er of Zhao died of illness, and his son Zhao Ao succeeded to the throne. Implicated in Guan Gao's rebellion, Zhao Ao was deposed from the throne by Liu Bang. However, because he later married Princess Lu Yuan, Zhao Ao was given the title of Marquis of Xuanping. The Liang kings Peng Yue, the Chu king Han Xin, the Huainan king Yingbu, and the Yan king Zang Di were all killed because they had plotted or attempted rebellion, and Han Wangxin fled into the territory of the Xiongnu, and their fiefs were changed to Liu Zong.
At this time, only the 7 princes with different surnames who were divided into princes in the early Han Dynasty were left with the King of Changsha, but Liu Bang did not destroy the King of Changsha, on the contrary, he also let the State of Changsha pass on 5 generations of monarchs, but only later because they had no heirs, they were deposed, was it a special favor for the State of Changsha? In fact, Wu Rui, the king of Changsha, and others were able to have a relationship with Zhang Liang in the end, because Zhang Liang gave him a plan, and Wu Rui and other successive kings of Changsha followed his advice.
Once, when Zhang Liang came to Wu Rui's house for a few days, Wu Rui asked Zhang Liang what he should do to avoid the coming disaster. Zhang Liang's suggestion can be summed up in one sentence: Let Liu Bang feel that you are not a threat to him, after all, who would argue so much with a prince who is not a threat?
To this end, Wu Rui chose to act in a low-key manner, dedicating some of his fiefdoms to Liu Bang's children, and giving some of his elite soldiers to Liu Jia (Liu Bang's cousin) the king of Jingzhou and so on. Through this series of measures, Liu Bang's concerns were completely dispelled, and the king of Changsha was able to pass on five generations!