Most US companies that I am familiar with apply US laws to all their users, at least to some extent. For example, I don't think that YouTube will allow you to post a blatantly copyright-infringing video, even if your account declares a country that doesn't enforce US copyright laws. Similarly, I suspect that Facebook would take down a page for a terrorist group, without needing permission from the country they are based in. I'm curious if you know of counterexamples.
I'm not necessarily saying that US and Chinese laws are equivalent in this sense, but it does seem like something of a double standard.
I'm not necessarily saying that US and Chinese laws are equivalent in this sense, but it does seem like something of a double standard.