Ruth Yun-Ju Chen is a historian of mid-imperial China (600–1400). Her research interests lie in the histories of medicine, publishing, and material cultures during this period. Her first book, Good Formulas: Empirical Evidence in Mid-Imperial Chinese Medical Texts, will come out from the University of Washington Press in 2023. This book charts how early print culture reshaped strategies for presenting medical knowledge in Song China (960–1279). Her current project explores the transregional circulation of medical knowledge and aromatic drugs across East Asia and Southeast Asia in Song-Jin-Yuan China (960–1368). She has published articles in Chinese and English language journals and, most recently, “A New Study of Scholar-officials’ Roles in the Printing of Medical Texts in Song China” in the Bulletin of IHP 92.3 (2021) and “The Quest for Efficiency: Knowledge Management in Medical Formularies” in the Harvard Journal of Asiatic Studies 80.2 (2021).