I’ve checked and it seems things are not that bad on that front. The identified new Chinese sources were eliminated, if I understand correctly. There are still some sources unaccounted for, which is concerning, but those might be anywhere, not just in China.

Here’s an article, if you were interested: https://climate.nasa.gov/news/3065/nasa-funded-network-tracks-the-recent-rise-and-fall-of-ozone-depleting-pollutants/