[Location] Localized in the supine position, on epigastrium, 4 cun from Zhongwan ( RN 12 ). ( Fig.94 )
 
[Regional Anatomy] Skin→subcutaneous tissue→external oblique muscle of abdomen→internal oblique muscle of abdomen→musculus transverses abdominis. Superficial layer, the distribution of the lateral cutaneous branches of the seventh, eighth and ninth rami antenores nervorum thoracalium, and the subordiantiat ramus of thoracoepigastric veins; deep layer, the muscular branches of the seventh, eighth and ninth rami anteriores nervorum thoracalium, and concomitant arteries and veins.