That really depends on:
your experience, your clients, where are you located and so on.
The large design offices in shanghai are expensive but some have excellent designers and western management.
Same as our fees, we are still more than half cheaper than in Europe.
In Europe prices range from 80-125 euro/h for concept/design work!!!Engineering bit lower. Here i know you can hire product engineers from 11-25 USD per hour in the office, than this is a Chinese person.
But than i donnot know what the local free-lancers ask, but count on very low wages/hour rates.
For me this is a challange cause there is alot of local talent here, and so you can operate cost effective and the added value of being close to cheap mass production, think about this potential market and what i see now is that some foreign design agencies open there offices in Shanghai.
br
Roger