虞抟

Yu Tuan was a physician of the Ming dynasty. Publicly available sources offer limited information about his life, and details such as his dates, native place, and courtesy name are difficult to verify today. His extant representative work, and the only work by him included in this collection, is the Medical Rectitude (Yixue Zhengzhuan), commonly classified under medicine. The book is a comprehensive medical work covering both medical theory and various clinical specialties, reflecting an approach that organizes earlier doctrines while adding the author's own views; its language aims at clarity so that later students can follow it. Given the scarcity of historical records, his life and intellectual lineage should not be over-inferred. An understanding of Yu Tuan's medical outlook must still rely mainly on the arguments and structure of the Medical Rectitude itself. Later physicians' citations of and study of this book have also secured it a place in the transmission of Chinese medical literature.