[Location] Localized in the supine position, on the upper abdomen. 4 cun above the center of the umbilicus and 2 cun lateral to the anterior median line. ( Fig.45 )
 
[Regional Anatomy] Skin→subcutaneous tissue→the prior of rectus abdominis' sheath→rectus abdominis. Superficial layer, the lateral and prior cutaneous branches of the prior branches of the seventh, eighth and ninth thoracic nerves, the superficial epigastric vein; deep layer, the branches or the subordiantial ramus of the superior epigastric arteries and veins, the muscular branches of the prior branches of the seventh, eighth and ninth thoracic nerves.