On the chest, in the 1st intercostal space, 4 cun lateral to the anterior median line.
Sensation of fullness and pain in the chest, cough.
Descends rebellious Qi and frees the chest.
Oblique or subcutaneous insertion .5 - .8 cun. Under the points from ST 11 to ST 18, there are important organs and a main artery. Do not puncture these points deeply.