Which point on the abdomen is 2 cun lateral to the midline and 2 cun superior to the umbilicus, level with Xiàwǎn REN-10?

• A. ST 20
• B. ST 21
• C. ST 22
• D. ST 23

Answer: (D)

The point location tested is about matching two reference measurements on the abdomen: how far from the midline (2 cun to the side) and how far above the umbilicus (2 cun higher). Xiàwǎn REN-10 sits on the midline, 2 cun above the umbilicus. A stomach-channel point that is 2 cun lateral to the midline at that same vertical level corresponds to ST-23. So the description fits ST-23 precisely.

In short, two-dimensional coordinates—2 cun lateral to the center and 2 cun above the navel, at the height of Ren-10—identify ST-23 on the stomach channel.