Under the premise of ensuring the safety of vehicles against collisions, the integrated design and application of new materials for the body, chassis and truss body structure have effectively improved the passive safety of the vehicle; the weight of the new battery has been balanced, and the electric The power and cruising range of automobiles have reduced costs and energy consumption per unit mileage, lowered the quality of the entire vehicle, achieved energy conservation and emission reduction, and inspired changes in the upstream and downstream industrial chains of the automobile manufacturing industry.