According to literature review and the theory of original

qi

and Systemic theory， it is believed that

sanjiao

（三焦） exists as a function， and is characterized by cavity， which is the main place for the body

qi

transformation. By introducing the “resonant cavity” principle， it is proposed that the function of

sanjiao

determines the promotion of

zang

-

fu

（脏腑） organs. In terms of s

anjiao

syndrome differentiation， the nature and location of the disease should be combined， and it can be classified into upper

jiao

（焦）

qi

excess， upper

jiao

（焦）

qi

deficiency， middle

jiao

（焦）

qi

excess， middle

jiao

（焦）

qi

deficiency， lower

jiao

（焦）

qi

excess， and lower

jiao

（焦）

qi

deficiency. Pulse-taking based on systematic syndrome differentiation in combination with s

anjiao

theory are used to explore the upper

jiao

（焦）

qi

excess and upper

jiao

（焦）

qi

deficiency， and it is found that the etiology of them are both fundamentally related to the emotional factors， and the pathogenesis is essentially the abnormal function of upper

jiao

（焦） on

qi

transformation and the disturbance of

qi

movement. The treatment rule is opening the chest and normalizing the

qi

， and the recommended formula is

Modified Gualou Xiebai Banxia Decoction

（瓜蒌薤白半夏汤加减）.