Surgical method: Minimally invasive ablative ultra-pulsed CO2 fractional laser surgery with the most advanced international laser surgery system imported from the United States. Anesthesia: generally local anesthesia, outpatient surgery is possible. Length of stay: <24 hours if hospitalization is needed (same day admission for surgery, same day discharge, or for out-of-town patients or those living far away, they can be observed overnight and discharged the next morning). Hospitalization cost: according to the size of the treated scar area, Shanghai unified charge standard, 100 RMB per light spot. Recovery time: You can basically live a normal life on the same day after surgery, but you need to change medicine and forbid bathing in the operated area within 1-2 weeks after surgery.