When evaluating city buses, prioritize the powertrain type (Diesel Euro V/VI, CNG, or Electric). For electric buses, verify battery capacity (kWh) and energy density, ensuring a range that meets your daily route requirements. Pay close attention to passenger capacity (seated vs. standing ratio) and floor height; low-floor designs are essential for rapid boarding and accessibility. Additionally, ensure the chassis and body frame utilize anti-corrosion electrophoresis technology to extend the vehicle's lifespan to at least 10-12 years.