Can the elevator not be affixed with a no-demolition sign?

You can't. According to the Law of the People's Republic of China on Safety of Special Equipment, the signs that must be posted on elevators are composed of "Elevator Inspection Qualified Sign", "Elevator Safety Instruction", "Maintenance Company Name and Telephone Sign", "Emergency Alarm Instruction", "Elevator Operation Certificate", "No Smoking Sign" and "No Smoking Sign". A warning sign will be added to the new sign, prohibiting passengers from pushing and pulling the door. Elevator refers to the permanent transportation equipment serving several specific floors in a building, and its car runs on at least two rigid tracks perpendicular to the horizontal plane or with an inclination angle less than15.