1. Precise scissors cutting. 2. Relative to laser surgery, the postoperative healing time is short. A. The incision is neat, which is conducive to post-operative healing. B, there is no high temperature and some circumcision ring stimulation of the incision, which is conducive to healing. Laser is equivalent to high temperature burns. 3.Without high temperature and foreign body stimulation, the chance of edema appears small. 4.After the longest time test. 5.The patient’s burden is light.