The quality of the product you get, like always, is about what people are willing to pay. The big difference is that the current cost of labor/material inputs there, is low enough that you can get the same or often better quality for less.
I wouldn't call that dumping. And to be clear, yeah they've done dumping in some cases.
But when we look at what's happened in the last 8 months or so around various AI SaaS-ish offerings, one could argue that plenty of US companies have done 'dumping with extra steps'. (And that's not even the first time necessarily, e.x. the DoorDash Pizza Arbitrage thought experiment...)
> It's also worth noting that many Chinese manufactured goods would mostly substitute for US manufactured goods (eg cars).
Heck, GM was (although they are moving it due to the Tariffs AFAIR) building the Buick Envision (Compact CUV) in China and shipping it to the US for sale. GM Announced in January that they'd move production to the US by 2028.
Similar for The Lincoln Nautilus (Midsize CUV), The current Gen is built in China and they only in the last month announced that they would move production back to the US... by 2030.