Dr. Chih-Wei Tseng is the Chief of the Department of Internal Medicine at Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, and an Associate Professor at Tzu Chi University, School of Medicine. He completed his medical training at National Yang Ming University. His research interests include hepatitis B virus reactivation in patients with rheumatoid arthritis undergoing biologic treatments, focusing on antiviral prophylaxis to improve patient safety, and advancements in water exchange colonoscopy, emphasizing procedural optimization and patient comfort.