The Chinese people overwhelmingly approve of their government, so they have no reason to overthrow it.

• What kind of democracy does China have, and how is it different from the west?
• In contrast to low US political approval ratings, 96% of Chinese are satisfied with the national government (Edelmans 2016). World Values Surveys says that 83% think the country is run for their benefit rather than for the benefit of special groups. A Harvard research center study of long-term public opinion survey finds that > 95% of Chinese citizens approved their government.

Meanwhile the US congress government have gotten <20% approval ratings for years. You should probably take some lessons from the PRC on how they overthrew an oppressive government and internal reactionaries, because they have more experience at it than most countries.