I've never seen a product designer (and I've known a few) that couldn't easily discard any poll or questionnaire about the "customers" desires.
I have met designers like that, but I have also met many good designers who try to give the customer what they want.
After all.... isn't the product designer the expert?
Usually not. They are the expert when it comes in terms of how to design things, but to them, requirements come from a document. If it isn't in the document, it isn't necessary. Now the requirements can be modified but that usually costs extra.
Specifying requirements is expectantly true when dealing with China. A combination of culture and time zone differences mean that if something isn't clear, they won't ask questions but instead will take a guess (asking questions is an embarrassment) and they probably won't tell you they did so. As a result it is important to specify things extremely accurately.