In medical emergencies, the patient or casualty rescue has a "golden hour", that is, within one hour to get effective medical rescue measures, the mortality rate can be reduced by 25%. Ambulance aircraft are equipped with far more than conventional ambulances complete rescue diagnostic and treatment equipment, speed and efficiency far more than conventional land and waterway transportation.
Reasonable use of a medical emergency helicopter can achieve the effect of a dozen ambulances, while saving time and a large number of accompanying medical personnel, is very efficient means of emergency. The vibration and acceleration brought by the helicopter to the patient are very small, and the comfort level felt by the patient in the helicopter is much higher than that of the most advanced ambulance. To explore a model of 999 air medical emergency in China, which is suitable for Chinese characteristics, will definitely benefit the general public in the long run.