Which point lies on the upper arm at two thirds of the distance from Tianjing SJ-10 to Jianliao SJ-14 along the line toward Jianliao?

• A. SJ 14
• B. SJ 12
• C. SJ 13
• D. SJ 16

Answer: (C)

The San Jiao points along the upper arm follow a path from the elbow (Tianjing) up toward the shoulder (Jianliao). If you measure two-thirds of the distance from Tianjing to Jianliao along that line, you land on the point situated between the mid-upper-arm points, which is SJ-13. This location sits between SJ-12 (closer to the elbow) and SJ-14 (at the shoulder), along the line toward Jianliao. Therefore SJ-13 is the point described. The endpoint near the shoulder is Jianliao, and the others lie closer to the elbow or are not on that exact segment.