Successful application of the combination of "3S foreskin measurement method" and "Korean painless foreskin cosmetic plastic surgery". This is the golden partner of circumcision at present. Accurate, safe and painless, natural and beautiful after operation, leaving no scars. 3S foreskin measurement method, comprehensively calculate the size of foreskin under three conditions, and ensure that no more or less than one millimeter is cut. Only by correctly implementing the measurement method of 3S circumcision can we ensure that the patient's operation is successful once and no secondary repair operation is carried out.