On the lower abdomen, 1.3 cun inferior to Dàhéng SP-15, 4 cun lateral to the midline.

• A. SP 13
• B. SP 12
• C. SP 11
• D. SP 10

Answer: (A)

The pattern here is about how abdominal points on the Spleen channel are laid out relative to the midline. Dàhéng (SP-15) sits on the abdomen 4 cun lateral to the midline at the level of the umbilicus. Moving downward along the same vertical line, a point 1.3 cun below SP-15 and still 4 cun lateral to the midline corresponds to SP-13. So this location is SP-13, which is the point identified by that specific combination of vertical distance from SP-15 and distance from the midline.

The other options are different points that do not share that exact coordinate along the same abdominal line, which is why they don’t fit this description.