Dr. Geng Junying brings ovcr twenty-five years of expcrience to this, his most reccnt work on tradition- al Chincse medicine. Dr. Geng is an Associate Pro- fessor and the Dcputy Dircctor of the Acupuncture Departmcnt at the Beijing Collcgc of Traditional Chinese Mcdicine. He has spent virtually his cntire career at this prestigious collegc, whcre he has bccn teaching, researching, and conducting clinical prac- tice since his graduation in 1964. His publications in Chiacse include Studits of tbe Five Tasfes of Herbs, Conlraindications and Interdipcndence in Herbal For- Mulas, and Cbinese Moxibustion Thtrapy. In English, he has co-authored four volumcs in this five-volume scries-Basic Tbtories and Principles, Acupuncture and Moxibustion, Medicinal Herbs and Herlbal Formulas.