Zhang Zhifang, Master of Medicine, Associate Chief Physician of the Cardiac Ultrasound Center at Shanghai Children's Medical Center Specializes primarily in echocardiographic diagnosis of fetal and pediatric congenital heart diseases. Has been involved in cardiac ultrasound outpatient services, interventional ultrasound, and transesophageal ultrasound for many years. Possesses profound expertise in the diagnosis of complex congenital heart diseases, with particular proficiency in fetal echocardiographic diagnosis. Current positions: Member of the Perinatal Ultrasound Group, Shanghai Medical Association Ultrasound Branch; Member of the Perinatal Medicine Department, Ultrasound Branch, China International Exchange and Promotive Association for Medical and Health Care; Member of the Cardiac Ultrasound Group, Ultrasound Branch, Shanghai Medical Association for Social Medical Institutions. Expertise: Ultrasound diagnosis of complex congenital heart diseases, especially fetal echocardiographic diagnosis. Has published over 20 research papers, led and participated in multiple research projects, and contributed to the compilation of several medical monographs.