刘怡

Liu Yi is an author for whom limited public information is available. Four works are currently listed under this name, covering fields as varied as medicine, military affairs, and examinations. Among them, Clinical Cephalometric Radiography (2nd Edition) is a specialist medical work which, judging from its title, concerns the clinical technique of cephalometric radiography and is likely intended for clinical and teaching needs in areas such as orthodontics. Roman Soldiers turns to military history, reflecting an interest in the organization and daily life of ancient soldiers. There are also two textbook editions, Public Finance (3rd Edition) and Public Finance (2nd Edition), indicating that the author's writing also extends to economics and examination preparation materials. Because biographical information is lacking, it cannot be confirmed whether these works are by the same author, nor is it possible to determine the author's identity or areas of expertise; readers may learn more by consulting the individual books.