It is possible that the car's ignition switch is broken. The ignition switch has the ACC position, the ON position, and the START position. Turning on the ACC position is to connect the car's electrical equipment, such as audio, lights, etc. The ON position is to connect the ABS (anti-lock braking system), AIRBAG (airbag), oil pump and car ECU working power. And START means to begin. If the car cannot stop turning on, the most likely reason is that the car's ignition switch is broken.
For detailed answers, it is recommended to go to the 4S store to see a maintenance technician.