When the trunk lid is closed, the displacement of the loading point should not be greater than 4 mm and the displacement of the loading point should not be greater than 4 mm when it is openedThere should be no permanent deformation after loading.The gas spring and tension spring connection brackets shall not fall off under the load of 500N.The rivet release force shall not be less than 14500 N.The M6 projection welding fastener shall bear a torque of 35 Nm without deformation and looseness and the M8 projection welding fastener shall bear 60 Nm torque without deformation and loosenessThe riveted shaft/ball stud must withstand a 9000 N axial force without push out or breaking.The change of opening and closing torque after durability testing must not exceed 15%, the change of torque of the mounting bolts must not exceed 30%.