Turn off the AC first or turn off the engine first?

[HavenRose]

Turn off the AC before turning off the engine. Here is relevant information:1. Reason for turning off the AC first: If you turn off the engine first and then turn off the AC, the next time you start the car, the engine will start with the AC running, which undoubtedly increases the engine's load. Besides increasing fuel consumption, it also causes damage to the engine itself.2. After the car has been exposed to the sun: When the car has been exposed to the sun, if the outside temperature is 35 degrees Celsius, the interior temperature can reach 65 degrees Celsius within 15 minutes, causing the concentration of toxic gases inside the car to be 5 to 7 times higher than usual. Therefore, you should open all four windows for ventilation, then start the engine and turn on the AC. After blowing out the hot air from the AC, turn on the AC cooling switch. After cooling for 1 minute, you can close the windows, effectively preventing the harmful gases inside the car from escaping.