So many bots in this thread, down voting everything that is anti china - be it true or false. Very curious to see that not even HN is safe from them.
As the guidelines say, if you're worried about abuse, you should be emailing us so we can look into it.
Here are hundreds of past explanations going back many years:
https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
FWIW I would encourage you to use the above email as a lot of comments do seem greyed out for no reason.
Here is one of them: https://i.imgur.com/iSqZTEq.png
It's in French, the top translates to "Sponsored - Media controlled by the state of China". Though, maybe they are not that careful with their budget as they should have had French/Arabic translations.