Did not get camera back after security check. How do I file a claim with Hangzhou Airport?

May I know if there is any sensltive content in your camera? They may confiscate it. If not, they may make a mistake. Perhaps your camera now is in the Lost and Found Office. Anyway, try to dial 86-0571-86662530 to contact the office first. And 96299 is the general inquiry hotline of the airport by the way. Good luck!

No sensitive info on camera.

Oh, I am sorry to hear that. You are advised to inform the staff about this by dialing 86-0571-96299. Good luck!