Which San Jiao point lies 3 cun proximal to SJ-4, level with and on the ulnar side of Zhīgōu SJ-6, between the ulna and the extensor digitorum communis muscle?

• A. SJ-6
• B. SJ-7
• C. SJ-8
• D. SJ-9

Answer: (B)

The location is along the ulna side of the forearm where the San Jiao channel runs upward from the wrist. The point described sits 3 cun above the wrist (proximal to SJ-4), at the same horizontal level as Zhīgōu SJ-6, and specifically on the ulnar side of the extensor digitorum communis between the ulna and that muscle. That exact position corresponds to SJ-7. So, SJ-7 is the point you’d locate when you have SJ-4 at the wrist, SJ-6 nearby as a reference level, and you’re seeking the point on the ulnar side between the ulna and the extensor digitorum communis about 3 cun proximal to SJ-4.