According to this theory, acupuncture adjusts the flow of qi in the body , leading it to areas where it is insufficient and draining it from areas where it is stuck and/or superabundant. In this way acupuncture restores the harmonious balance of the body and its parts. In Chinese, there is a saying, "if there is pain, there is no free flow, if there is no free flow, there is no pain." Acupuncture promotes and reestablishes the free flow of qi.