I have previously tried to register a bank account in Hong Kong, and the issue seems to be similar. However, this didn't require to be a citizen but physically visit HK. Have you tried to do it through the HK company? - I bet its much easier.
Due to the new security law, I am however very cautious doing anything in that region. This is too unstable (especially if you are a U.S citizen). And just to mix up the discussion a bit, I found another research which might be useful for you.
Most likely you have solved the issue by now, if not, keep us posted.