The Huangdi Bashiyi Nanjing , often referred to simply as the Nan Jing, is one of the classics of traditional Chinese medicine . 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. Among the contributions it makes to TCM are:
* The establishment of the “Qi Jing Ba Mai” .
* Establishment of the theory of Back-Shu, Front-Mu and Yuan-source points.
* Development of the Five-Shu Points theory, which is the basis for Five-element Acupuncture.
* First mention of ''deqi'', the energetic sensation a practitioner feels when reaching correct placement of an acupuncture needle.