collaborated with an auto parts manufacturer to customize hardware hydraulic rods for car trunks. Using 304 stainless steel material, through precision welding and sealing processes, the hydraulic rod can bear a load of 80kg, which can easily support the trunk door, lifting smoothly without jamming. The buffer piston design is silent without impact when closing, suitable for trunk doors of different weights. The surface is electrophoretic rust-proof treated, resistant to high and low temperatures, suitable for various sedan and SUV models, easy to install without complex debugging. This customized hydraulic rod helped the partner reduce the failure rate of trunk door products by 75% and increase the user satisfaction of supporting models by 83%.