1, physical training objectives Improve the joint mobility of the residual limb, enhance muscle strength; increase the wear-resistant and pressure-resistant strength of the skin of the residual limb (especially the skin of the weight-bearing part); eliminate the swelling of the residual limb; enhance the muscle strength of the healthy side of the upper limb, the lower limb and the torso; improve the ability of balance; and enhance the overall physical fitness. 2.Mental preparation Establish the concept of using prosthesis; understand the importance and methods of caring for the residual limb; understand the structure and function of prosthesis; understand the training procedure, training content and training purpose.