My experience with Chinese instruments has been very good. We just have to understand that they do not decide on the quality, they just build to order.
When I last visited, I saw the production lines. If some customer wants a $50 trumpet, they will build it. For $51, you get some nickel silver trim, for $52, a bit thicker metal. $55 gets you a couple of mu more Monel on the valves... And so it goes up to their most expensive instruments that cost maybe $650 each (including mouthpiece, case and white gloves) when a container full is ordered. The realistically purchased instruments are VERY, VERY good!
The bad guy is not the manufacturer, rather the customer that is willing to pawn off cheap on their customers.