Prusa's comments here are very important. In this specific case, China is not "stealing intellectual property" in the sense that they are using it without a license; they are literally stealing title to the inventions in question, which is way worse.

Of course, the obvious solution would be to not respect international patent priority from China, but that is tantamount to fighting a trade war, which has significant strategic implications. You can't sue the US to force them to de-normalize trade relations with China for the same reason why you can't sue the US to force the army to nuke China.