Liu Guohua, Chief Physician of Urology, Professor, and Doctoral Supervisor. He has long been engaged in clinical and research work in pediatric urology, accumulating extensive clinical experience. He has utilized the "Onlay" and "Duckett" procedures for the treatment of pediatric hypospadias; performed gastric augmentation cystoplasty in children, laying the foundation for the clinical practice of lower urinary tract reconstruction and continent urinary diversion in children in China. He specializes in pediatric urological diseases; the diagnosis and treatment of pediatric urinary tract tumors; and the diagnosis, treatment, and research of congenital genitourinary tract malformations, tumors, and urinary organ reconstruction in children.