An electric vehicle primarily consists of three major systems: the chassis, body, and electrical components. The chassis system of a pure electric vehicle is largely similar to that of conventional vehicles, mainly comprising the driving system, suspension system, transmission system, braking system, and steering system. The key difference lies in the powertrain, where the traditional internal combustion engine is replaced by an electric motor. For Kunming Bus's low-speed electric pickup truck, the body structure is divided into several systems, including the upper body, lower body frame, doors, cargo bed, interior/exterior trim, and accessories. The most critical components are the "three-electric" systems: the motor, battery, and electronic control system.