Online filing with traffic management is simplified; compliance certification channels for off-road chassis lift kits and shock absorber modifications are improved. New models of Tank, BJ, and Fangchengbao reserve installation positions for shock absorbers and auxiliary fuel tanks from the factory. OEM modified chassis parts are included in the vehicle warranty, driving the growth of supporting orders for modified shock absorbers and suspension bushings. The 2026 domestic automotive modification market size is expected to reach 21.05 billion yuan, with chassis suspension modifications accounting for over 35%.