On the lower abdomen, which point lies 2 cun lateral to the midline and 3 cun inferior to the umbilicus, level with Guānyuán REN-4?

• A. ST 28
• B. ST 20
• C. ST 21
• D. ST 22

Answer: (A)

Focus on precise point localization using fixed body landmarks. Guānyuán (REN-4) sits on the midline, 3 cun below the umbilicus. The point described is at the same vertical level as REN-4 but 2 cun lateral to the midline, on the Stomach meridian in the lower abdomen. That combination—2 cun lateral to the midline and 3 cun below the umbilicus, level with REN-4—defines the point ST-28. The other options would occupy different horizontal or vertical positions and do not match these coordinates.