According to Baidu Encyclopedia, the elevator roof rushing refers to the elevator rising out of control and colliding with the elevator shaft, which is the most serious accident. When the car hits the top of the elevator shaft, people in the car will hit the top of the car due to inertia.

The elevator is mainly controlled by the motherboard, which is a part of the elevator and is easily influenced by the outside world. Such as high temperature, and when taking out the garbage, if you accidentally let the acid and alkali substances such as leftovers touch the control system, it will affect its normal work. It will rise sharply and produce a peak. For example, the elevator incident at Huaqiao University is a problem with the control system.