Which point is on the dorsal aspect of the ring finger, at the junction of lines drawn along the ulnar border of the nail and the base of the nail, approximately 0.1 cun from the corner of the nail?

Which point is on the dorsal aspect of the ring finger, at the junction of lines drawn along the ulnar border of the nail and the base of the nail, approximately 0.1 cun from the corner of the nail?

• A. SJ 1
• B. SJ 2
• C. PC 2
• D. PC 9

Answer: (A)

The key idea is the exact fingernail area where the San Jiao channel’s Jing-Well point sits. On the ring finger, the Shaochong point is on the dorsal side near the nail corner, about 0.1 cun from that corner, along the ulnar border of the nail. That precise location—dorsal surface of the ring finger at the nail edge, just a hair’s breadth from the corner—is what identifies this point in standard anatomical terms. The other options refer to points located elsewhere on the hand or on different digits, so they don’t match this nail-corner, ring-finger location. Knowing this fingernail-based landmark helps you quickly distinguish the San Jiao Jing-Well point from other channel points and reinforces how Jing-Well points are typically found at the distal tips or nail corners of the fingers.

The key idea is the exact fingernail area where the San Jiao channel’s Jing-Well point sits. On the ring finger, the Shaochong point is on the dorsal side near the nail corner, about 0.1 cun from that corner, along the ulnar border of the nail. That precise location—dorsal surface of the ring finger at the nail edge, just a hair’s breadth from the corner—is what identifies this point in standard anatomical terms. The other options refer to points located elsewhere on the hand or on different digits, so they don’t match this nail-corner, ring-finger location. Knowing this fingernail-based landmark helps you quickly distinguish the San Jiao Jing-Well point from other channel points and reinforces how Jing-Well points are typically found at the distal tips or nail corners of the fingers.