Humans can break with a particular level of suffering, and once they break, the government will collapse.
China has controlled its large population ever since its holding its communist ideology. It's true there is a high level of corruption but its people do not protest about it because they know what will happens if they do so. As long as a countries economy is doing well and people are not starving to death they won't make any movements for collapsing the government in a country like China.
Even though the crackdowns occur continuously and get severe punishments, it seems that the corruptors are always looking for loopholes to commit corruption. but we can see big countries such as China that carry out a communist system, where equality for the entire population is going well. and until now China is a big country that influences most countries in the world