Meridians and collaterals are circulation routes of qi and all qi pertains to meridians and collaterals. Health qi in human body is circulation in meridians and collaterals except ancestral qi and its circulation modes are 3 categories:

The first category is circulation of viscera and bowels qi: qi of viscera and bowels are started from their viscera and bowels and runs into distribution areas of main meridian along main meridian and supports organism of administration areas of main meridian. Qi of viscera and bowels are formed lesser circulation by meridians in internal and external relation, it enters from yin to yang and from yang to yin and this lesser circulation is called “six combinations” in circulation of meridians and collaterals. It runs into other viscera and bowels and meridians and collaterals through distribution of meridians and collaterals and plays the role of coordination of qi transformation.

Meridians in internal and external relation circulation composed by lung meridian and large intestine meridian: lung qi can reach large intestine from meridians and vessels and transfers from index finger, branching crevice behind wrist, collaterals of Pianli acupoint along lung meridian into large intestine meridian then to large intestine. Large intestine qi transfers from meridians and vessels into lung and forms circulation. Divergent collateral of lung meridian connects large intestine meridian at neck side and forms circulation route which is from hands to head and is distributed over heart during circulation.

  Function of lung qi must keep normal functional activity on condition of purification and descendance. If lung qi loses downward it will appear dyspnea and cough and constipation. Materials that absorbed by small intestine and transfers into large intestine absorb vestigial moisture and nutrient and transfer out of body; if large intestine qi is uneasy to transfer it will appear symptom of heat thirst and phlegm-dryness. Circulation of qi of two meridians keeps purification downward and transfer. Qi of two meridians participate and receive qi of general circulation, lung meridian receives qi which liver meridian transfers and transfers into large intestine meridian then transfers into stomach meridian. Qi of general circulation plays the role of whole coordination in lung qi and large intestine qi. (Fig. 83)

Meridians in internal and external relation circulation composed by spleen meridian and stomach meridian: spleen qi can reach stomach from meridians and vessels, stomach qi can reach spleen from meridians and vessels and transfers from hallux and collaterals of Fenglong and Gongsun acupoints along stomach meridian into spleen meridian then to spleen and forms circulation routes. Divergent collateral of spleen meridian connects stomach meridian at medial angle of eye and forms circulation routes from feet to head and is distributed over heart in this route.

  Function of spleen is transportation and transformation that is function of digestion food and digests fluid mainly. Function of stomach is receiving food, digest and descending the turbid; it receives digestion and transports food stuff. Combination of two qi can completes digestion process normally. Qi of two meridians participates and receives qi of general circulation. Stomach meridian receives qi that large intestine meridian transfers and transfers to spleen meridian then to heart meridian. Qi of general circulation plays the role of coordination with whole function in spleen qi and stomach qi. (Fig. 84)

Meridians in internal and external relation circulation composed by heart meridian and small intestine meridian: heart qi reach small intestine from meridians and vessels and transfers from pinkie and collaterals of Pianli and Tongli acupoints along heart meridian to small intestine meridian then to small intestine. Small intestine transfers qi to heart and forms circulation route. Divergent collateral of heart meridian connects small intestine meridian at side of throat and forms circulation route from hands to head, this route is not distributed over other viscera and bowels.

Function of heart which includes brain and heart is blood circulation system. Function of small intestine is absorption of food nutrient. Combination of two qi can transmit nutrient which is absorbed from blood to the whole body, qi of two meridians participates and receives qi of general circulation. Heart meridian receives qi that transfers from spleen meridian and transfers to small intestine meridian then to bladder meridian. Qi of general circulation plays the role of coordination in heart qi and small intestine qi. (Fig. 85)

Meridians in internal and external relation circulation composed by kidney meridian and bladder meridian: kidney qi can reach bladder from meridians and vessels, bladder qi can reach kidney from meridians and vessels and transfers from little toe and collaterals of Dazhong and Feiyang acupoints along bladder meridian to kidney meridian then forms circulation. Divergent collateral of kidney meridian is distributed over neck and connects bladder meridian then forms circulation route from feet to head and is distributed over heart and lung during the circulation.

  Function of kidney is uropoiesis and bladder is urine amassment. Kidney qi reaches bladder then bladder has function of qi transformation and micturition. Circulation of two meridians qi keeps normal excretion of urine. Qi of two meridians participates and receives qi of general circulation, kidney meridian receives qi that transfers from pericardium meridian and transfers into bladder meridian then to triple energizer meridian. Qi of general circulation plays role of coordination in kidney qi and bladder qi. (Fig. 86)

Meridians in internal and external relation circulation composed by pericardium meridian and triple energizer meridian: pericardium qi can reach triple energize