When sourcing from a minibus factory, you must prioritize the powertrain reliability and chassis strength. For internal combustion engines, verify Euro IV, V, or VI emission standards compliance. For electric minibuses (EVs), focus on battery capacity (kWh), energy density, and NEDC/WLTP range. Ensure the factory uses monocoque body structures or high-strength steel frames to enhance passenger safety and vehicle longevity. Additionally, check for seating capacity flexibility (typically 7 to 23 seats) and air conditioning (HVAC) BTU ratings suitable for your local climate.