The Green Nang Sutra was a medical classic written by Hua Tuo in ancient China. It was a comprehensive work of Chinese medicine, including the basic theory of Chinese medicine, meridian theory, syndrome identification and treatment, prescriptions and other aspects of content. The Green Nang Sutra was written by Hua Tuo during the Three Kingdoms period. It mainly talked about the basic theory and treatment methods of Chinese medicine, including syndrome identification, acupuncture, massage, drug therapy, and so on. Among them, some of the theories and methods in the Green Nang Sutra, such as "Five Shu","Four Qi","Five Elements", etc., were regarded as important components of ancient Chinese medical theory, which had a profound impact on the development of Chinese medicine. The Green Nang Sutra was an important part of ancient Chinese medical culture and one of the important classics of Chinese medicine. It was of great significance to the study of Chinese medicine theory and practice and to understand ancient Chinese medical culture.