When evaluating a Jinbei ambulance, you must prioritize the engine performance and chassis stability. Ensure the vehicle is equipped with a reliable gasoline or diesel engine (typically 2.0L to 2.4L) that meets local emission standards (e.g., Euro IV, V, or VI). The interior must feature medical-grade PVC integrated molding for easy disinfection, a centralized oxygen supply system, and a high-power sine wave inverter (at least 1000W-2000W) to support life-saving equipment like ventilators and defibrillators.