When the elevator has a "crack" or other failure, the elevator will automatically stop running, which is an automatic protection measure for the elevator. If this happens, we don't have to panic because the elevator is equipped with a safety anti-drop device. Once it falls, the anti-drop device will be stuck in the track on both sides of the elevator slot so that the elevator will not fall. At this time, you should press the external call button in the elevator to contact the property company in the first time. The property will promptly notify the elevator maintenance unit. Within half an hour in the urban area, the maintenance unit will usually arrive at the scene. During the waiting period, if you hear a sound outside, you can shout loudly to attract the attention of passing pedestrians. Special reminder is, don't try to open the elevator from inside. This is because when the elevator fails, the circuit of the door sometimes fails. At this time, the elevator may start abnormally. In addition, the trapped person does not understand the elevator stop. When you are in the position of the floor, you will blindly open the elevator door and there is a danger of falling into the elevator shaft.