尤乘

You Cheng: his birth and death years, native place, and courtesy names are not clearly recorded, and publicly available information is limited, so this introduction can only be based on his surviving works. Judging from the three works held in the collection, You Cheng's writing is mainly concentrated in traditional medicine, covering both materia medica textual research and clinical laryngology, while a classification under literary appreciation suggests that his interests and writing were not confined to technical medical texts alone. His representative work, Two Qing-Dynasty Works on Distinguishing Materia Medica, focuses on clarifying the names, realities, similarities, and differences of medicinal substances, reflecting a style that values textual comparison and evidential research. The Secret Manual of You's Laryngology deals with the diagnosis and treatment of throat disorders, leaning toward practical clinical use, with concise wording that is easy to consult. Overall, You Cheng's writings are modest in length but combine scholarly discernment with clinical reference value, making them useful material for understanding traditional laryngology and materia medica studies.