Which point is 3 cun proximal to Yángxī L.I.-5 on the line connecting Yángxī L.I.-5 with Qūchí L.I.-11?

• A. LI 7
• B. LI 8
• C. LI 6
• D. LI 9

Answer: (C)

On the Large Intestine channel, points line up along a straight path from LI-5 (Yangxi) toward LI-11 (Quchi), with distances measured in cun from LI-5. If you move 3 cun up the arm from LI-5 along that line toward LI-11, you arrive at LI-6 (Pianli). LI-6 sits on the dorsum of the forearm, on the radial side, in a shallow depression between the radius and the extensor muscles. So the point exactly 3 cun proximal to LI-5 along the LI channel toward LI-11 is LI-6. The other points are located at different positions along that line (not matching the 3-cun mark), so they don’t fit this description.