Where is the heater switch for JMC Shunda box truck?

The heater switch for JMC Shunda vans is on the center console. The temperature adjustment knob on the left is the heater switch. The steps to turn on the heater are as follows:

1. Turn the key gate to the rearmost gear and start the engine.

2. Let the engine idle until the water temperature reaches 90 degrees.

3. Rotate the temperature control knob to the red area on the left and right sides.

4. Push the cycle button to the left to start the cycle in the car.

5. Rotate the wind speed adjustment knob to the 4th gear on the far right to turn on the heating system. (Operation completed)