Yes, I'm running an Oldchen branded EL34's based SE amp. A truly excellent amp. I've only changed the tubes. I found that NOS Russian tubes sounded better than the PsVane tubes mine came with. This thing also sells as Aiqin an Nobsound.
I also have a Nobsound MS10D hybrid amp. It's one of the later revisions rather than the earlier ones which had issues with too much voltage to the tubes. Once more it sounds better than it has any right to with NOS Russian tubes in there
A mate is also running one in his holiday house, loves it.
My main system runs a Yaqin MC10T with upgraded coupling caps, volume pot, and a mix of NOS and current production tubes.
Then there are my EAR 834P copies from Douk Audio. I bought two of these. Amazing after tube rolling
I was rather happy with a Yaqin MS23b for a number if years too. It was noticeably better than a Cambridge Audio 651p I had around the same time
I also have a number of Chinese DACs, interfaces and class D amps. All of these punch way above their weight. The only let down so far have been bits of gear branded as Little Bear. The T10, T8, 5-1 tube buffer. All pure pieces of crap.... The T10 wasn't bad once the hum issue was resolved, it's just my Yaqin MS23b was better..... I never found better till I moved to the EAR 834P copies.
Anyway, my point is don't be put off by the naysayers. There are plenty out there willing to bash Chinese gear. Just do your research and you'll be right.