Focuses on "Nan Jing" or "Classic of Difficulties," a collection of questions and answers that attempts to clarify difficult passages from the "Nei Jing" or "Yellow Emperors Internal Cannon," published by Hsu Ta Ch'un. Needling techniques described in the book to rectify elemental attacks; Characteristics of an ideal pulse; Levels that can be superimposed onto the body's acupuncture points.