Dr. Lijun Song is the associate chief physician of Department of Rheumatology, Qilu Hospital of Shandong University. He has been engaged in clinical, teaching and scientific research of rheumatology for 16 years. Good at the diagnosis and treatment of rheumatoid arthritis, ankylosing spondylitis, systemic lupus erythematosus and other rheumatic diseases. He studied at NYU Langone Medical Center for one year in 2019.