the most common use of warning signs is as a warning sign for temporary stops. It is often seen in the trunk of a car, and unlike other warning signs, which are suspended from fixed sign posts, it is usually simply propped up on the road some distance from a temporarily parked vehicle. Remind the driver to avoid. for this purpose, Article 52 of the Road Safety Law of the People's Republic of China clearly states that "A motor vehicle breaks down on the road. When it is necessary to stop for troubleshooting, the driver shall immediately turn on the danger alarm flash and move the motor vehicle to a place where it will not interfere with traffic. If it is difficult to move, the danger alarm flash shall be continuously turned on, warning signs shall be set up in the direction of the coming vehicle and other measures shall be taken to expand the warning distance, and the alarm shall be given promptly when necessary.