At this point, I'm inclined to believe that you have a personal or commercial reason to blame Zhou.
I wanted to question the same. I have officially requested a contact method of AurumXchange so that I can hire an attorney to look into the situation, but they posted this without giving me any information. (Roberto asked me whether I wanted an address, I said yes.)
AurumXchange didn't request any documentation from me and decided to withhold the funds. There's no mention anywhere in the TOS or AML that withholding of the funds will ever happen. Instead, they have said that if the funds are questionable, they will return them to the original sources.