Well I think the issue is the people in China haven’t experienced the democracy in US so the comparison would be hard to measure. As funny as it gets the people in the US can laugh at Joe Biden but not those in China that could laugh at president Xi.
A note accompanying the poll results offers a disclaimer, stating that “in authoritarian countries, positive perceptions might result from different conceptions of democracy, high levels of government satisfaction, or fear of speaking out against the government.”