Professor Lian-Zhong Zhang is an expert in the field of ultrasound medicine and is proficient in ultrasonic diagnosis of cardiovascular, abdominal, obstetrics and gynecology, small organs and other diseases, especially good at the diagnosis of difficult cardiovascular diseases and ultrasound interventional treatment of tumors in all parts of the cardiovascular system. Professor Zhang is the Executive Director of the Chinese Society of Ultrasonic Medical Engineering, Vice Chairman of the Committee of Molecular Imaging of the Chinese Society of Ultrasonic Medical Engineering, President of Ultrasonic Physicians of Henan Medical Association and President of Ultrasonic Medical Engineering of Henan Province. Professor Zhang has been engaged in postgraduate education for many years, and the field of research involves cardiac ultrasound, interventional ultrasound, contrast-enhanced ultrasound, telemedicine.