Triple energizer (sanjiao), alternatively named the “solitary fu-organ,” is one of the six fu-organs. It is the largest in size among the zang-fu organs, including the upper energizer, the middle energizer, and the lower energizer. Triple energizer (sanjiao) governs qi in the entire body and regulates water passage. The Meridian of Hand-shaoyang has an exterior-interior relationship with the Pericardium Meridian of Hand-jueyin. Physicians of past generations held varied ideas about triple energizer (sanjiao) in its form and substance. Some thought triple energizer (sanjiao) per tained to six fu-organs and performed comprehensive functions. It was a large fu-organ located in the thoracic and abdominal cavity without an exterior-interior relationship with any of the five zang-organs. Others believed that triple energizer (sanjiao) divided the internal organs into three parts. The upper energizer referred to the region above the diaphragm, the middle energizer in between the diaphragm and the naval, and the lower energizer below the navel.