I listen to my airband radio in Hong Kong all the time with no problems. I did get harassed by the heavily armed guards at Kai Tak once who told me it was illegal. I got into an arguement with them. Anyway, I put it away, and checked out the law. Listening into the airwaves appears to be legal. However, if your scanner has the capability of listening into the Piloce, I would be careful. Apparerently, a policeman was telling me that in small crime cases, you have to prove that you are innocent, and not them proving that you are guilty, so you would have to prove to the police that you weren't listening into the police channels. A difficult one, but overall, unlikely to happen. I wouldn't worry. Just bring it and be a bit discreet with it and you'll be fine.