On the chest, in the third intercostal space, 2 cun lateral to the anterior midline.
🧭 How to find it (practical)
In dorsal decubitus, locate the point in the third intercostal space, at the midpoint between the sternal and midclavicular lines, 2 cun lateral to the anterior midline.
🔬 Anatomy
Pectoralis major muscle. 3rd intercostal nerve.
💉 Needling
Transverse-oblique insertion, 0.5–0.8 cun.
📜 Etymology
Ling (灵), heart; Xu (墟), ruins, mound. The point corresponds internally to the heart. Externally it lies on a prominence resembling a hill.
