Which San Jiao point lies along the line from SJ-4 to the lateral epicondyle of the humerus, 7 cun proximal to SJ-4?

• A. SJ-8
• B. SJ-9
• C. SJ-10
• D. SJ-11

Answer: (B)

Think of the San Jiao channel as running up the outer side of the arm from the wrist toward the elbow. Starting at SJ-4 at the wrist, tracing that line toward the elbow, the point you reach about seven cun up is located on the lateral upper arm near the elbow. That position corresponds to SJ-9, which is why it’s the correct choice. The other points listed lie at different locations along the same line, not at the seven-cun mark from SJ-4.