1.Small trauma: the incision in the groin area is only 2cm, cosmetic suture, no need to remove stitches after surgery. 2.Good cosmetic effect: minimally invasive incision of calf wound, no need to suture the incision, no obvious scars after surgery. 3.Short hospitalization time and low cost: generally 2-3 days after surgery can be discharged from the hospital, saving costs.