黄帝内经
The Huangdi Bashiyi Nanjing (), often referred to simply as the Nan Jing, is one of the classics of traditional Chinese medicine (TCM). Written in the late Han dynasty, the "Nan Jing" is so named because its 81 chapters seek to clarify enigmatic statements made in the Huangdi Neijing and is used extensively for study and reference in Japanese acupuncture and traditional Japanese medicine (TJM).