Dr. Jun Ouyang，MD, PhD. Professor and chief doctor of the department of Urology, the First Affiliated Hospital of Soochow University. Dr. Ouyang graduated from the School of Medicine, the Soochow University in 1986. Since then, he has been practiced the clinical medicine as urologist for 28 years. Dr. Ouyang specializes in urinary Lithiasis, urologic oncology, BPH and renal transplantation. Especially in the field of the surgical management of complicated kidney stones, invasive bladder cancer and urinary tract reconstruction. He is the member of the Chinese Urological Association and Chinese Organ Transplantation Association. He participated the establish of Chinese Urological Guidelines and is one of the editors of Chinese Textbook of Surgery for medical school.