[Introduction to "conducting yang from yin, and conducting yin from yang"].

"Conducting yang from yin, and conducting yin from yang" is the essential principle of acupuncture and moxibustion in treatment of diseases, originated from Neijing (Internal Classic). In clinical, yin and yang are not just limited as the natures of meridians and zangfu organs, but also refer to the locations of acupoints, such as the upper and the lower, the left and the right, the anterior and the posterior, the exterior and the interior. Besides, they include the time of acupuncture, such as four seasons and midnight-midday ebb flow, and the manipulation of acupuncture, etc. The ultimate goal of acupuncture is to regulate yin and yang.