there seems to be a fair amount of OEM tube amp manufacturing going on in china - scary part is, i played a couple of them at musikmesse, and they didn't sound too shabby at all. definitey NOT as good as a 2203, a überschall or a wreck... but FAR from bad.
i distinctly remember one exhibitor called eleca that actually offered me a head - 3x 12AX7, 2x EL34 for €150 on the spot - i only turned it down because a. i couldn't use 50W (hell, i've never even cranked my 5W tube radio-modded-amp unless i knew my neighbours weren't around) and b. i didn't feel like lugging 25 kg by train back home.
that being said, the 50W amp in your link weighs 13.2 kg including the speaker - miniature magnet, tiny trannies? you get what you pay for, i suppose. and hope.

In the interest of full disclosure, I am Animal Factory Amplification.