During the Xia, Shang, and Zhou dynasties in China, the emperors divided the princes into various regions, and each prince independently governed his own land, which was a system of sub-feudalism, and this system was also a system that lasted for many years in the history of our country. Although these three dynasties have also been destroyed by their own princes, although the drawbacks of this system are very large, it is undeniable that it laid the foundation for the formation of China's imperial power system.
After Qin Shi Huang unified the six kingdoms, he deeply understood the threat of the sub-feudal system to his emperor's power, so he abolished the sub-feudal system and adopted the county system to return all the rights to the central government, which proved that the county system was more conducive to the unification of the country and the rule of the emperor, so the continuation of the county system in later generations was also very much. However, since the Qin Dynasty, many countries have picked up the sub-feudal system again, but the object of the sub-feudal system has changed, the sub-feudal system in the Xia, Shang, and Zhou dynasties was to divide the local fiefs to the heroes, while the Western Han and Western Jin dynasties all divided the local feudal system to the imperial family.
During the Sui Dynasty, Yang Jian improved the system of sub-feudalism and implemented semi-sub-feudalism, and after dividing the country into several regions, he divided it into his children to manage, and did not require them to be assigned posts in the corresponding areas under the central government's name, and they must be dispatched by the central government. Yang Jian's purpose was not to really let his children become princes, he just wanted to curb the development of other families, in the society at that time, it was better to hand over military power to his children than to several big families. Otherwise, it is really likely that there will be a situation of division between the heroes of the Xia and Shang Zhou periods.
Genghis Khan also adopted the system of sub-sealing, but his purpose may be more pure, although he was also afraid of his children fighting for the throne, but the territory he laid down was too big, it was inconvenient to pass orders, from the local to the slowest place in the central government even had to take more than a year, and when the information arrived, the yellow cauliflower was cold, so the sub-sealing system was also the best way at that time, and the territory was too large, which was not conducive to unified management, so it was directly to let them autonomy in the region. In the end, just listen to Genghis Khan.
In history, during the Western Han Dynasty, the Western Jin Dynasty, and the Ming Dynasty, there were historical and famous imperial turmoils, but as the founding emperors of the Western Han, Western Jin, and Ming Dynasties, how could Liu Bang, Sima Yan, and Zhu Yuanzhang be faint-hearted people, they must have known that dividing the feudal family and giving military power was a very big hidden danger in the future, so why insist on dividing the local areas into the imperial family? It can only be said that compared with the division of the seals to the heroes, this can be done for more time, they do not have a better way to achieve the whole unification, due to the information and production technology and population density in various places, etc., the implementation of such a sub-sealing system is also the way they have no way.