Approximately 0.5 cun posterior to the midpoint of the line between Taixi KID-3 and Shuǐquán KID-5, on the anterior border of the Achilles tendon?

• A. KD 1
• B. KD 2
• C. KD 3
• D. KD 4

Answer: (D)

This location corresponds to the point Dazhong on the Kidney meridian. It sits on the anterior border of the Achilles tendon, about 0.5 cun behind the midpoint of the line connecting Taixi (KD-3) and Shuǐquán (KD-5). KD-3 is located behind the medial malleolus, while KD-5 is near the ankle along the medial tibia, so the midpoint between them lies near the lower ankle region. About half a cun behind that midpoint places you right at the front edge of the Achilles tendon, which is where KD-4 is described. The other options are not in this Achilles-area location: KD-1 is on the sole, KD-2 is on the medial foot, and KD-3 is posterior to the medial malleolus, not at the Achilles border.