The Huang Di Nei Jing, a.k.a Yellow Emperor’s inner classic or canon, is considered a fundamental text of chinese medicine, going back approximately 2000 years. It exposes TCM principles and applications in the form of a Q&A between disciple and old master. The canon is divided into two sections both containing 81 chapters (where 8+1=9, 9 being the number for the sky in chinese metaphysics). The first section is Su Wen, or “Basic Questions” deploying the theories at the root of all diagnostics, and the second section is the less known Ling Shu, or Spiritual Pivot, which is more directly about applications and acupuncture.
HERE is an Annotated Translation of Huang Di’s Inner Classic – Basic Questions: 2 volumes, by Paul Unschuld (University of california Press). A complementary history and comparative literature of the Su Wen, also by Paul Unschuld, can be read HERE. A chinese manuscript (Wang Bing’s version) can be found HERE on World Digital Library.