When Li Xia n3 is driving, turning on the air conditioner and putting it in neutral will turn off the engine.

Good: Your condition should be caused by dirty throttle. I suggest you clean the throttle. If it still doesn't work, you'd better find a maintenance technician in S shop to check whether the idle speed rises when turning on the air conditioner. Under normal circumstances, the computer will increase the engine idle speed, because turning on the air conditioner increases the load. I hope my answer is helpful to you.