Location
On the palmar surface, 3 fen to the inner [ulnar] side of the center of the second phalanx of the index finger, 3 points in total. Divide the phalanx into three equal segments.
On the palmar surface, 3 fen to the inner [ulnar] side of the center of the second phalanx of the index finger, 3 points in total. Divide the phalanx into three equal segments.