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

• A. ST 20
• B. ST 29
• C. ST 22
• D. ST 23

Answer: (B)

You locate abdominal points by using the umbilicus as a vertical landmark and measuring in cun from the midline. Zhōngjí (Ren-3) sits on the midline, 4 cun below the umbilicus. A point that sits 2 cun to the side of the midline at that same vertical level is on the Stomach channel in the lower abdomen, which corresponds to ST-29. So the position described—2 cun lateral to the midline and 4 cun inferior to the umbilicus, level with Ren-3—matches ST-29.