Dr. Sun Chuanyin serves as a Deputy Chief Physician in the Department of Rheumatology and Immunology at The First Affiliated Hospital of zhejiang University, College of Medicine. With over a decade of experience in rheumatology and immunology, Dr. Sun specializes in the study and clinical management of Adult-Onset Still’s Disease and IgG4-related diseases. His research is centered on understanding the mechanisms behind these conditions and developing effective treatment approaches.