We all know that since Qin Shi Huang unified China, abolishing the division of feudalism and establishing the county system, thus laying the foundation for the historical process of China's great unification, since the Qin Dynasty, in this piece of eastern land in China, the ancients have always established the country and called the emperor, and they have always taken the unification of the world, the unification of the Central Plains, and the unification of the north and south as their pursuit goals. However, the second feudal dynasty after the Qin Dynasty, the Han Dynasty, his founder Liu Bang, instead of claiming the title of emperor, implemented the "sub-feudal system" to turn back the clock in history.
It should be known that in 221 BC, Qin Shi Huang destroyed the last state that was divided into Zhou Tianzi- the State of Qi, and then in order to strengthen the centralization of power, Qin Shi Huang learned the lessons of Zhou's death, and at the suggestion of Li Si, did not implement the Zhou sub-feudal system, but implemented the county system, and there was no kingdom or prince's territory in the entire Qin Dynasty.
On the third day of February 202 BC, Liu Bang was proclaimed emperor in Dingtao District, Heze City, Shandong Province, and the founding name was "Han". In the Newly established Han Empire, in January of the following year, Liu Bang wantonly divided up four princes of the Liu clan, namely Liu Bang's cousin Liu Jia, the King of Jing; his younger brother Liu Jiao, the King of Chu; his elder brother Liu Xi, the King of Fengdai; and Liu Bang's eldest son Liu Fei, who was the King of Qi.
From 201 BC to Liu Bang's death, Liu Bang, the ancestor of Han Gao, divided into 9 vassal states, namely Dai, Zhao, Yan, Qi, Liang, Wu, Huainan, and Chu. After Liu Bang, around the centralization of power, the Western Han Dynasty had many contradictions between local princes and the central government, such as Lü Hou's suppression of the princes, the rebellion of the Seven Kings of the Han Jing Emperor, the rebellion of the Han Wu Emperor Huainan Wang, the Han Wu Emperor's "Tui En Order" and so on.
The reason why Liu Bang wanted to implement the system of sub-feudalism actually had a lot to do with the social environment at that time, as mentioned above, the reason why Qin Shi Huang implemented the county system was to learn the lesson of the fall of the Zhou Dynasty, and the reason why Liu Bang implemented the "sub-feudal system" was because of the lesson of the demise of the Qin Dynasty - no royal son raised an army to maintain it! By the time of the fall of the Western Han Dynasty, the great empire had not yet sealed the country and raised troops, and it has to be said that Liu Bang's practice was first sweet and then bitter, and Liu Bei Liu Xiu was a victim!
It must be explained here that it is not that the children of the Great Qin royal family do not rise up, the key is that Hu Hai of Qin II is too powerful, and it is recorded in the "Records of History" that the twelve sons (of Qin Shi Huang) died in Xianyang City, and the ten princesses died in Du. Soon after Hu Hai's reign, he slaughtered and killed all his brothers, not even his sisters.