1. Step on the brake pedal of Changan van.
2. Twist the car key of Changan van and start the engine.
3. The instrument of Changan van lights up, and turn the engine to 90 degrees.
4. Turn the wind speed knob to the 3rd position of left internal circulation, and turn on the air conditioning system.
5. Turn the temperature knob to the rightmost red area to turn on the heating mode.