Ruyu received her Bachelor of Medicine in Clinical Medicine and Ph.D. in Social Medicine from Zhejiang University, China. Her research background is in public health, with a focus on social and behavioral sciences, social epidemiology, and health promotion. Her doctoral research explored preconception health behaviors among reproductive-aged women and men, with particular attention to individual and interpersonal factors influencing health behaviors. She has extensive experience in quantitative, qualitative, and mixed-methods research. Ruyu is particularly interested in understanding how behavioral and social factors influence maternal and child health across the life course. Building on her previous work in preconception health, she is excited to expand her research into movement behaviors and sleep during pregnancy and postpartum, contributing to the lab’s mission of improving maternal health.