Lost someone else's ID card or hotel key card on the cruise ship. How can I broadcast to inform others to pick it up?

The safest way to find an ID card is to give it to the police uncle or dispose of it at the nearest police station. The police station can check the owner of the ID card through the public security system and notify the owner to claim it. You can also call 1 10, 1 10, and the police will transfer the police information to the police station where the owner is located, and then the police station will come to collect the ID card or contact the owner.