I have been buying PCBs from China for 20+ years, and have got through lots... they usually go bust every few years. Or just the only English-speaking person leaves, which amounts to the same thing because the company may as well then be on Jupiter.
Before that we were using Chinese via a UK "front man" but the prices were high. Of course the mfg name was always concealed from us but we once found out it was Kam Hing Electronics whose website was infected with a nasty virus for years and they never fixed it; eventually they vanished.
Before that I was using various UK firms but the quality was crap, and BBT was usually skipped if the end of the month was near.
Currently I am using Viasion
https://www.viasion.com/ (ask for Tina) and they are very good. Good prices and good boards.
Previously I used Auspi
https://www.auspi.cc/ for some years and then discovered that they destroyed the BBT tooling (some $400 per board) after 12 months of no orders for that board, which was in their small print, but was quite outrageous. When I spoke to them about it I got the typical Chinese arrogant treatment, so I stopped using them (with tooling chucked out there is zero incentive to use the same company again) but they kept phoning up and asking for more business and simply did not understand that chucking out $400 BBT tooling is not really reasonable practice in the West!
JLCPCB for prototypes but would never use them for production due to lack of communication and basically typically
modern-Chinese arrogant attitude.