This man seems well-formed to us so no problem there. However it could be a bad idea to compliment him in case he thinks you are coming on. If you are out of luck you could end up with a row of pits without a suggestion of a screen. We wonder what Chinese people do when a crowd is waiting for a vacancy. There are no doors to tap on and the alternative is too horrible to contemplate. You have to mind your P’s and Q’s in China, especially before you go.