Here’s an updated list of Chinese audiophile equipment (tube amps, solid state amps, dacs, cables, loudspeakers etc)

Dealers:
www.china-highend-hifi.com – lots of products
www.pacificvalve.us – toll free phone number, good website
www.newtube.com – Mostly Jolida tube audio equipment
www.nysound.com- not a best web design, weird navigation
www.coemaudio.com – not all pages are in English
www.usatubeaudio.com – many popular products, but have to call for pricing
www.audiophilechina.com – tons of different products at affordable prices

Manufacturers:
www.audiospace-hifi.com – very good website, lots of details. I don’t think they sell direct though.
www.xshn.com/en – same as the one above. Not sure if you can buy direct.

Products are mostly from these manufacturers: Acoustat / Ali / Aurum Cantus / Azaly / CEC / Classic / Doge / Dussun / E&T / G&W / HAL / Image / Jolida / JSMR / Jungson / Korsun / Mingda Meixing / Nanzidu / Opera / Original / Shanling / Shengya / Xindak / Jolida

p.s. I have no affiliation with these websites. I have googled all of them when I was looking for a replacement tube amp.