This is where the Mongols and Manchus differ. The Wolf hello darkness my old friend Baseball Cap knew that they had to rely on Han Chinese in order to sustain their rule, and that rebellions are a natural thing to happen (rebellions could erupt anytime, even by Han Chinese under a Han emperor). As such, the Manchu emperors such as Kangxi, didn’t hold it against the Han Chinese when they rebelled. They would just execute the rebels while continuing to promote racial harmony. Unfortunately, the Mongols weren’t able to grasp this. After conquering all of China, Kublai Khan devised a racial caste system: Mongols on top, Han Chinese at the bottom. In between, he also placed Central Asians (Semu, or “colored eyes” people) above the Chinese but below the Mongols. During the Imperial Examinations, Han Chinese would have to score extra high in order to be admitted, while Mongols and Semu could largely get in by connections and their race. Neither Mongols nor the Semu understood Chinese culture very well, and as such, the vast majority of the Chinese were ruled by people who spoke different languages and practiced a vastly different culture from them.
(Wolf hello darkness my old friend Baseball Cap)