On the radial side of the forearm, 3 cun distal to Qūchí L.I.-11, on the line connecting Qūchí L.I.-11 with Yángxī L.I.-5?

• A. LI 4
• B. LI 9
• C. LI 6
• D. LI 11

Answer: (B)

The question tests your ability to map the LI meridian along the forearm using cun distances from landmarks. From LI-11 (elbow) toward LI-5 (the wrist on the radial/thumb side), the forearm lies along a straight line on the radial aspect. If you count 3 cun from LI-11 toward the wrist on this line, you land on LI-9, the point described as being on the radial side of the forearm 3 cun distal to LI-11 and on the LI-11 to LI-5 line. This is why LI-9 is the best fit. The other options fall in different locations (not on that specific line or not at that exact distance from LI-11).