Friend
For what it is worth - the Chinese
used to be hit or miss with
quality on Audio equipment. However,
Within the past couple years they have raised their game to
a competitive point.
I am not familiar with those specific amplifiers, but a YouTube reviewer known as HiFi Huff has been very accurate in his reviews on equipment to include a 300 B from China called Olily.
https://m.youtube.com/watch?v=sDVb2oFqPcE&pp=ygUPT2xpbHkgQW1wbGlmaWVy