Zhi, limbs; gou, ditch.
Zhi here refers to the upper limb. The point is located between the radius and the ulna.
3 cun above the transverse dorsal crease of the wrist, between the ulna and radius.
Pain in the hypocondriac region, shoulder & arm, constipation, deafness, tinnitus.
Perpendicularly 0.8-1.2 cun.