The book entitled the Huang Ti nei ching [Canonical Works of Huang Ti] has two sections - the "Su Wen" section and the "Ling Shu" section - and each section contains eighty-one articles. It was written by several authors in different historical periods. According to historical records and scholars' studies of the content and context of the book, we can roughly say that it was written in the period between the late years of the Warring States era and the early (...) years of the Eastern Han dynasty. Seven articles in the "Su Wen" section were materials from an "older version" and were merged into the book by Wang Fing in the Tang dynasty. They were probably written by scholars in the Eastern Han period or a little later. The two articles on acupuncture and pathology have been proved forgeries made in the Tang-Sung period. They should not have been included in the book because they contain more idealist dregs than do the other articles. (shrink)