Advantages: Hard-to-hard cup system, low wear rate of the joint surface. Stabilization of the hip joint after surgery, less likely to dislocate, quicker recovery. Large range of motion of the hip joint after surgery. Shi Zhencai, Department of Bone and Joint Surgery, China-Japan Friendship Hospital, is suitable for young and active patients. Typical case: Male, 36 years old, advanced stage of bilateral femoral head necrosis, ineffective treatment with traditional Chinese medicine, femoral head collapsed. He had pain, limited activity, and difficulty in putting on socks and shoes alone. She went down on the second day after surgery and was discharged on the fifth day to return home. She went to work 3 weeks after the operation and resumed her previous work.