Which acupuncture point is on the abdomen, 2 cun lateral to the midline and 4 cun superior to the umbilicus, level with Zhōngwǎn REN-12?

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

Answer: (B)

The key idea is locating abdominal acupuncture points by using precise body landmarks and the cun measurement. 4 cun above the umbilicus on the midline is REN-12 (Zhongwan). Moving 2 cun to the side from the midline at that same horizontal level places you on the Stomach meridian’s abdomen tract. That exact position corresponds to ST21. So, ST21 is the point that sits on the abdomen, 2 cun lateral to the midline and 4 cun above the umbilicus, level with REN-12.