Huayong Zhang, MD, is an Associate Professor, Chief Physician, and Vice Director of the Department of Rheumatology and Immunology at Nanjing Drum Tower Hospital. He also holds the position of Vice Chairman of the Jiangsu Rheumatology Association and is a member of the Youth Committee of Rheumatology and Immunology of the Chinese Medical Doctor Association. Huayong Zhang obtained his Ph.D. from Nanjing Medical University and further expanded his expertise through a visiting scholar program at Harvard Medical School. With over 20 years of clinical experience, he specializes in the diagnosis and treatment of various autoimmune diseases, including systemic lupus erythematosus, rheumatoid arthritis, and ankylosing spondylitis. His particular focus lies in the application of mesenchymal stem cell transplantation for the treatment of autoimmune diseases.