Dear Editor,rnI am Dr.Hui-Rong Chen,from the Department of Urology in Shanghai First People\'s Hospital at Shanghai Jiao Tong University,Shanghai,China.Premature ejaculation (PE) is a common sexual dysfunction,affecting approximately 20％-30％ of sexually active men.According to intravaginal ejaculatory latency time (IELT) of 1 min,the incidence is approximately 1％-3％.1.