Dr. Cheng-Yu Chang is a visiting staff member in the Pulmonary Division of Internal Medicine and Director of the Ultrasonic Endoscopy Center. He also serves as leader of the Lung Cancer Team and is an Associate Professor appointed by the Ministry of Education. His expertise includes chronic cough, asthma, chronic bronchitis, pneumonia, pulmonary tuberculosis, lung cancer, and geriatric emergency and critical care. Dr. Cheng-Yu Chang received his M.D. from Chung Shan Medical University, a Master’s degree in Preventive Medicine from National Taiwan University, and a Master of Law from Soochow University. He completed his residency in Internal Medicine and chief residency in Pulmonary Medicine at National Taiwan University Hospital (NTUH), where he also served as Adjunct Visiting Staff. Dr. Cheng-Yu Chang has authored numerous peer-reviewed publications and book chapters, and his research has received awards at the Taiwan Lung Cancer Society and the Taiwan Society of Pulmonary and Critical Care Medicine. He has also been repeatedly recognized as an outstanding mentor for resident physicians. His clinical and research interests focus on advancing diagnostic and therapeutic strategies for pulmonary diseases and lung cancer, with a strong commitment to education and interdisciplinary collaboration.