 Therefore, it is also called "Eighty-One Nan".The book is based on basic theory and has also analyzed some disease certificates.Questions one to twenty-two is about pulse study, questions twenty-three to twenty-nine is about meridian study, questions thirty to forty-seven is related to urgent illnesses, questions forty-eight to sixty-one is related to serious diseases, questions sixty-two to sixty-eight is related to acupuncture points, and questions sixty-nine to eighty-one is related to the needle point methods.