who designs all the "stuff" that comes out of China? always been curious?

Same type of people who design stuff anywhere. The companies will have people who decide what sells and then they will hire a designer if they dont already hav one working for them. Lots of them probably arent even Chinese; loads of Japanese, American, British companies etc hav their factories in China cause they can get away with paying them next to nothing, which people in their own countries wont tolerate.