If you get a Chinese amp that is sold by a US dealer you should be fine. I would avoid the cheaper Chinese tube amps that only seem to be available on Amazon or eBay. There is a reason they don't have dealer support!
We avoid Chinese parts in our equipment for reliability reasons, the exception being the tubes. The Chinese small signal tubes have been pretty good for us, the power tubes not so much- for them we use Russian made tubes. Oddly, the Russian small signal tubes don't seem to be that good IMO. The Chinese factory producing 6SN7s burned down a couple of years ago so they've gotten hard to get.
This issue is a bit prickly for me. For example if you are looking to repair a vintage audio piece that uses semiconductors, eBay has become a bad place to look for replacements because its flooded with Chinese knockoffs that won't meet spec and will likely fail if you try to install them. My personal concerns are how are the people treated that make the parts and the equipment? I do not know how much is real or imagined on my part. But there are companies that seem to do good work- Topping is one of them; they make extremely well engineered digital gear that is also at commodity prices- compact, reliable and also sound good.