Returning to China is not that easy. You may end up paying customs and shipping kilos is not cheap either. I returned a dac on AliExpress and didn't fully refund what I paid. They should have sent SP400 to Amirm before release.
They gotta eat but they are not as cheap as they used to, from 200 to 600$ there is a big difference, and they make mass-market electronics, it doesn't cost much in big orders. They are chinese but they want to live on Europe/US.