Disadvantages of infrared examination room

The difficulty is upgraded. The disadvantage of infrared examination room is the difficulty upgrade. Infrared rays are collectively called electronic examiners. Infrared ray is equivalent to a monitor. If it is blocked, it is considered illegal. Judge the examination method. Press the line over the line, slide the car, turn off the fire, etc. during the exam. Can turn on infrared rays, which greatly improves the difficulty of the exam.