I’m updating this for the next person who has a similar question.
We ended up getting a new police certificate, specifically for immigration to the U.S. It came in a booklet with a Chinese police certificate, translation, certification of translation (in Chinese) and translation of certification (in English); four pages in total.
This was accepted by the NVC without issue. We used https://www.beijingesc.com/. We still have friends in Beijing, but wanted to go with a company that had done this before. Also, we didn’t want to deal with the hassle of instructing friends through all the steps. It’s annoying having to pay so much for a document, but the company was quick, responsive and professional. I would recommend them.
Thanks for the help everyone. We were DQ’d the same day the police certificate was accepted and received our IL for four days later with an interview in early May.
Good luck everyone!