One ironic point is that if you sell something to the Chinese, they are the most exacting customers on the planet! If you sell them something, every box, every piece, must be accounted for and checked out in some way including the paperwork. Everything must work to their satisfaction (not yours). They will write these things into the purchase contract, and they won't pay you a dime until everything is perfect.
If they know you will treat them the same way, they will respond. It's part of their culture. Where we run into problems is when the people actually making the goods don't know the difference between good stuff and bad stuff. They don't even know what it is or why it is supposed to be a certain way, and they may not have the tools or knowledge to do it any different anyway. If the customer accepts it, then it must be ok.