Teacher Hongyan, a lecturer in healthy materia medica, is credible. Teacher Hongyan's explanation in Healthy Materia Medica is considered to be true and reliable, and she has rich experience and professional knowledge in the field of health. He delivered useful information about health preservation, which is not only true and reliable, but also practical and operable. Teacher Hongyan introduced: Teacher Hongyan: a lecturer in the field of traditional Chinese medicine in China, a famous old Chinese medicine practitioner in the capital, a disciple of Li Chuanshi, a master of meridians of traditional Chinese medicine, a national academic inheritor of famous old Chinese medicine, and a nutritionist of traditional Chinese medicine. He has been engaged in clinical and scientific research for more than 20 years, and devoted himself to studying the classic works of traditional Chinese medicine such as Huangdi Neijing, Shennong Materia Medica and Treatise on Febrile Diseases, and studying the methods used in ancient prescriptions.