The Medical Classic of the Yellow Emperor (Huang Di Nei Jing) is the oldest extant classic of traditional Chinese medicine (TCM). Compiled roughly two thousand years ago, this great masterpiece forms the theoretical basis of TCM. As TCM's history developed over the millennia, nearly all significant medical works benefited from the enlightenment of this unparalleled book. Covering not only medicine but also philosophy, sociology, anthropology, military strategy, mathematics, astronomy, meteorology, ecology, The Medical Classic of the Yellow Emperor demonstrates that even in ancient times, people accomplished scientific achievements that are applicable, relevant, and innovative even in modern times.