Pestle Needle Therapy is an acupuncture method characterized by a unique set of points, specialized tools and their specific methods of manipulation. Until modern times it has remained a secret method, passed down through a lineage to its modern inheritor, Li Zhong Yu, Professor of Acupuncture at the Chengdu University of Traditional Chinese Medicine. Despite the tools being called "needles", they are non-penetrative devices made of gold plated copper. Pestle needles do not pierce the skin; rather they are used to stroke, rub or press the points and channels of the body. This method of acupuncture is not found in the classic texts, although it is based on the same Chinese medical theory as conventional acupuncture, including the theories of yin-yang, the five phases and channel theory.