Yipeng Han is a PhD candidate at Peking University Peoples Hospital with a research focus in rheumatology and immunology Her work centers on the immune profiles of patients with RA with particular interest in T cell mediated mechanisms and immune dysregulation In parallel she investigates the salivary microbiome in patients with Sjgrens syndrome aiming to understand how microbial communities interact with local immune responses and contribute to disease pathogenesis Through integrating immunological and microbiome analyses her research seeks to uncover novel biomarkers and therapeutic targets in autoimmune diseases