Got DCCed at the end of my 10 day Australia Asia trip in the duty free store in PVG. Signature receipt shows RMB/USD option, I clearly marked RMB and asked the agent to select RMB. He said 'RMB? what you say?' and showed me the terminal which had no choice to pick. Of course after he hit the green button twice a receipt printed with no indication of what was picked either. Chase duly showed 47.95$ instead of 305 RMB.