You are cherry picking.

For the survey team, there are a number of possible explanations for why Chinese respondents view the central government in Beijing so favorably. According to Saich, a few factors include the proximity of central government from rural citizens, as well as highly positive news proliferated throughout the country.

This result supports the findings of more recent shorter-term surveys in China, and reinforces long-held patterns of citizens reporting local grievances to Beijing in hopes of central government action. “I think citizens often hear that the central government has introduced a raft of new policies, then get frustrated when they don’t always see the results of such policy proclamations, but they think it must be because of malfeasance or foot-dragging by the local government,” said Saich. 

Compared to the relatively high satisfaction rates with Beijing, respondents held considerably less favorable views toward local government. At the township level, the lowest level of government surveyed, only 11.3 percent of respondents reported that they were “very satisfied.”

Again, the U.S. reveals quite a different story. “American trust surveys over time show a clear distinction between low levels of trust towards the federal government, but a strong belief and faith in the power of local government — at the most local level, those positions may be filled by part-time volunteers who are a part of your everyday life,” said Cunningham. This dichotomy is highlighted by a 2017 Gallup poll, where 70 percent of U.S. respondents had a “great” or “fair” amount of trust in local government.

Saich contends that the lack of trust in local governments in China is due to the fact that they provide the vast majority of services to the Chinese people. This trust deficit was compounded by the 1994 tax reforms, which garnered a substantially larger share of total national tax revenues for the central government. Local governments, despite being faced with declining revenues, were still on the hook for providing the bulk of public services throughout China.

“Local governments were caught between dropping tax revenue and rising expenditures,” Cunningham said. “Many local governments then had to turn to ad-hoc extra budgetary fees to close the budget gap. I think that has consistently undermined trust at the local level.”

The national government leaves the local government responsible for providing services, fucks them over, then convinces the people that it's the local governments fault because they control the media. Of course they approve of the national government, though not the local at all so...

Also, a large part of the approval that this article states is because most of the people of China "are only a generation removed from an era of chronic food shortages and significant social and economic instability." Its easy to improve people's lives if they're starting from a shitty position. We'll see how that changes now that they're playing in the big leagues.

Chauvinism? Wrong word choice. It's chauvinism when you go around supporting one group from a position of prejudice, not when you attack some group, which wasn't happening anyway. Questioning if something is happening organically isn't the same as saying it's bad. Skepticism is usually a virtue. Don't accept everything you see and are told, and don't accept that it's happening by accident.