There are several verboten topics on HN. I hadn't noticed China among them but there are several sacred cows here which, when criticized, will get you a swift burial by downvoting. At least in those cases, it's definitely intentional and related to the subject person or industry, regardless of the truth of the post itself.
I looked at your comment history:
"It's chinese. lol" https://news.ycombinator.com/item?id=23482737 Comments like that will get you downvoted no matter what topic you post about.
"Why aren't all the liberals talking about human rights abuses in china ?" https://news.ycombinator.com/item?id=23482751 Liberals who've been constantly talking about human rights abuses in China probably won't enjoy you insinuating that they haven't.
"Has anyone noticed, if you mention chinese, you actively get your point decreased by one point." https://news.ycombinator.com/item?id=23482759 Complaining about downvotes will get you downvoted.