Very little is known about Wu Liangzhou's life, and available public information is limited: neither his native place, nor his dates of birth and death, nor his medical training can be reliably established. What can be confirmed is that a single medical work is attributed to him, Yilin Zhengyin (True Seal of the Medical Forest). Judging from its title and its common classification, the book belongs to traditional medical literature and likely deals with the analysis of medical principles, clinical guidelines, or the correction of physicians' errors, showing a distinctly professional medical orientation. Because biographical clues about the author are so scarce, readers today can approach Wu Liangzhou mainly through this transmitted work. In this sense, Yilin Zhengyin is not only the vehicle of his medical views but also the basic source for examining his writing style and scholarly concerns. For readers studying the transmission of traditional medical texts and the writings of physicians, the book offers a concrete text for close reading, and the author's name has been preserved through it.
