Ma Wujin — currently, publicly available information is limited, and no clear record of his life, nationality, or dates of birth and death has been found. According to the library's holdings, he has only one work, Classified Medical Cases (Lei Zheng Yi An), which falls under medicine. The term “classified symptoms” in the title suggests that the book is organized by symptom categories, while “medical cases” indicates that its content consists mainly of clinical records, a format common in traditional Chinese medicine. Such works typically gather cases by syndrome or disease type, recording the condition, the reasoning behind the diagnosis, and the prescriptions used, so that readers can compare and draw on them in practice. From this book, one may infer that the author had a medical background and clinical experience, and that his writing emphasizes factual records and practical use for diagnosis and treatment. Owing to limited sources, Ma Wujin's academic lineage, medical career, and the book's specific influence cannot yet be described in detail and await further research.
