Selection of Points by Reinforcing the Mother and Reducing the Son : It is based on the theory of reinforcing the mother for deficiency syndrome and reducing the son for excess syndrome of Classic on Medical Problems. It combines the therapeutic properties of the Five Shu Points with Five Elements Theory: wood, fire, earth, metal and water, the Five Shun Points can be selected, according to the interpromotion, and counteraction relations of the Five Elements. For instance, Lung relates to metal, when the excess symptom of Lung Meridian appears, select the He-sea point of Lung Meridian, Chize (LU5) which attributes to water, because metal generates water, water is the son of metal, selecting Chize(LU5) is so-called "Reduce the son for excess syndrome" When deficiency syndrome of the Lung Meridian appears, select Shu-Stream point of the Lung Meridian, Taiyuan(LU9) which attributes the earth, because earth generates metal, earth is the mother of metal, selecting Taiyuan(LU9) is so-called "Reinforce the mother for deficiency syndrome." 

补母泻子法:此法是根据《难经》"虚者补其母，实者泻其子"的理论而定的取穴方法。它是将五输穴的主治性能与木、火、土、金、水五行相配合，并结合脏腑的五行属性取穴。如肺在五行属金，实证，可取肺经五输穴中属"水"的合穴尺泽，因"金"生"水"，"水"为"金"之子，取尺泽即所谓"实者泻其子"。虚症，可取肺经五输穴中属"土"的输穴太渊，因"土"生"金"，"土"为"金"之母，取太渊即所谓"虚者补其母"。