The issue isn't that China is doing bad things, it's that as someone who is not in China sitting in probably an armchair, providing opinions and guidance across the world is a terrible way to provide well-thought out political advice. One should stick to where they have legitimacy, and that's usually in their local politics.
As a non-black person, it'd be like me criticizing black people for things they do. Since I cannot truly understand the black experience in America without being a black person, any criticism I levy against them would be wholly unfair.