Private individuals are not allowed to buy an ambulance because private purchases of ambulances are not allowed to be registered. The ambulance must have the qualification of the first hospital in order to get into the household. Ambulance is a kind of car specialized in transporting the injured. The car is equipped with a stretcher and sometimes emergency medical equipment. At present, the most common units of domestic purchase of ambulances are large and small public and private hospitals, state-approved qualified transportation companies, civil aviation airports, etc., private and ordinary units are not eligible to buy ambulances. Ambulance roof-mounted alarm lights, generally in the transportation of patients in crisis when the alarm is turned on, so that the front and both sides of the vehicle can be avoided in a timely manner, in the fastest and shortest time in a timely manner to save the patient.