I was in China in 2016.
Before I went, my priest told me (after checking with experts in the archdiocese) to NOT go to church there.
If I went to Mass in the real (underground) Church, I would put them in danger.
If I went to mass in the fake China church, I would be attending a phony church that had no apostolic succession and one that supports abortion.
Fortunately, I was able to find American Masses that had been recorded and were available on-line