Primordial qi is the root of human body. Tongyuan（ reaching primordial） regulates the body’s primordial yin and primordial yang

which is the core to treat irregulation of Zang and Fu

meridians and collaterals

nutritive qi and defensive qi or disfunction of qi movement. Practical principles of Tongyuan acupuncture method are leading qi to its primordial location

dredging the Du meridian and tonifying the spirit

yang qi guiding yin qi

dispelling pathogens by enhancing healthy qi. It has the features of focusing on the Ren and Du meridians

guiding yin and yang

regulating Zang and Fu

fully exposing the effect of meridian treatment

which largely expanded the indications of acupuncture.