钱乙

Qian Yi is a physician of notable standing in the history of ancient Chinese medicine. Publicly available sources are limited, and his dates of birth and death, native place, teachers, and official career are not reliably recorded, so they cannot be described in detail. Judging from the works held in this collection, his writings focus on pediatrics, and his representative work, Xiao'er Yao Zheng Zhi Jue (Key to Therapeutics of Children's Diseases), appears in four versions or related entries, showing its central place among the works attributed to him. The book addresses children's physiological characteristics, common illnesses and patterns, and the use of formulas, with clear organization that gives equal weight to pattern identification and treatment. Its concise language serves practical clinical use, reflecting a writing approach centered on real therapeutic effect. Its adaptation of formulas and differentiation of patterns offered later generations a model for diagnosing and treating children, and it has had a lasting influence on the formation and development of pediatric science in Chinese medicine. Qian Yi's name has been transmitted through this book, making it an unavoidable reference for the study of traditional pediatric medicine.