The court order in US will have to be recognized by Chinese court, even more trouble. LZ was basically right on the steps. However, if you are not close from the consulate, you may save a trip by doing authentication. The steps here may help you: http://visa.ywpw.com/authentication/powerOfAttorney.html This sample is for selling house but you just need to change the middle part.
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【在 n****m 的大作中提到】 : Another option. You can hire a laywer in the US to do the job. This way you : are in full control.