Lü Guolin is a Chinese author of medical books. Publicly available information about him is limited: apart from his name, nationality, and his representative work Xuanhu Shouji (Notes of a Practicing Physician), no clear records of his birth and death dates, educational background, or professional career have been found. Judging from the library's classification and work information, his writing focuses on medical subjects. The title Xuanhu Shouji carries a distinct mark of traditional medical practice, as "xuanhu" (hanging up the gourd) is often used to refer to the practice of medicine and healing. This suggests the book may center on clinical observations, experiences in medical practice, or medical essays rather than systematic textbook-style exposition. Works of this kind usually record diagnostic and treatment processes and reflections from a personal perspective, in plain language that emphasizes the transmission of experience and feeling. Since only one of his works is held in the library, it is still difficult to judge his overall creative trajectory and stylistic evolution; readers may regard this book as an entry point for understanding his approach to medical writing, and his authorial profile can become more complete only if more material comes to light.
