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Lung MeridianLU1

Zhongfu 中府

For reference only · not a substitute for diagnosis or treatment
Short answer

Upper front chest, level with the first intercostal space, 6 cun from the front midline.

Front-mu (alarm) point of the Lung
See it in 3DRotate the body and peel back the skin to see the bones and muscles beneath.
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🖼See it in pictures

Zhongfu — ① Where on the body?
① Where on the body?
Zhongfu — Textbook view — skin on the left, muscle and bone underneath on the right
Textbook view — skin on the left, muscle and bone underneath on the right
Location and structures come from our 3D model; only the drawing style was refined with AI. Labels are added by us.
Zhongfu — ② Up close
② Up close
Zhongfu — ③ Under the skin
③ Under the skin
Pectoralis major · First rib · Second rib

Rendered straight from the 3D model at the computed location. The glowing ring marks Zhongfu.

On this page
  1. Where is Zhongfu?
  2. How do I find it on my body?
  3. Before you press
  4. How has it been used traditionally?
  5. Alternative location
  6. FAQ

1Where is Zhongfu?

Upper front chest, level with the first intercostal space, 6 cun from the front midline.

It sits just outside the infraclavicular fossa, where Yunmen (LU2) lies.

Beneath the point

Pectoralis major · First rib · Second rib

Our 3D measurement · In our 3D model: 6.00 cun from the front midline (1 chest cun = 20.8 mm, 8 cun between the nipples), at the level of the first intercostal space. This body has a narrow upper chest, so that space cannot be seen from the front at the 6-cun line; the height at its outermost point visible on both sides (70 mm from the midline) was carried across (same height as ST14). That puts it 0.77 cun below Yunmen (LU2; vertical chest cun 17.5 mm) — 4.0 mm off WHO's note of 1 cun. Still to be verified.

2How do I find it on my body?

  1. Find Yunmen (LU2) first. Run a fingertip along the underside of the clavicle toward the shoulder until you meet the coracoid process; LU2 is the hollow just inside it.
  2. Find the height. The horizontal ridge near the top of the sternum (sternal angle) marks the second rib. The rib gap just above it is the first intercostal space.
  3. Find the width. Go out 1.5 times the midline-to-nipple distance (4 cun) and stop where this line meets the gap. In women, use the midclavicular line as the 4-cun line instead of the nipple, as the standard does for other chest points.
Check · it lies roughly a short way straight below LU2.
What is a “cun”?
What is a “cun”?

A cun is a body-scaled unit of length. The precise way is to divide a bone length into equal parts (proportional bone cun); finger widths are a quick estimate.

📖 Words explained
intercostal space
The gap between two ribs, felt with a fingertip as a slight groove between bone and bone. It is named after the rib above it (the gap below the first rib is the first intercostal space).
midclavicular line
A vertical line dropped straight down from the midpoint of the collarbone, usually passing near the nipple in men. It is used instead of the nipple when locating chest points in women.
infraclavicular fossa
The hollow below the outer part of the collarbone, between deltoid and pectoralis major. The coracoid process can be felt deep in its floor.
midclavicular line
A vertical line dropped straight down from the midpoint of the collarbone, usually passing near the nipple in men. It is used instead of the nipple when locating chest points in women.
sternal angle
The slight horizontal ridge where the manubrium meets the body of the breastbone; slide a finger down from the notch at the base of the neck and it catches on it. The second rib attaches right beside it, so it is the starting mark for counting ribs.
coracoid process
A hook of bone curving forward from the shoulder blade like a bird's beak. You feel its hard tip deep in the hollow below the outer part of the collarbone, at the front of the shoulder.
pectoralis major
The large fan-shaped muscle covering the front of the chest. It runs from the collarbone, breastbone and rib cartilages to the top of the humerus, and it tightens when you bring the arm forward or hug.
chest wall
The wall around the chest organs, made of skin, muscle, ribs and the muscles between them. In places it is thinner than you might think.

3Before you press

⚠ Do not press when
  • The pleura and lung lie just beneath the chest wall here.
  • Do not jab with pointed tools or dig in deeply.
  • If you suddenly become short of breath or have chest pain, do not try acupressure — call emergency services or get medical care.
  • Avoid broken or swollen skin and press only to a comfortable level.
  • Acupressure is not a substitute for medical care.

4How has it been used traditionally?

From traditional texts — not a claim of effect.

5Alternative location

Chinese standard (2021) differs · The Chinese standard (GB/T 12346-2021) adds a second chest ruler — 12 cun between the inner edges of the two coracoid processes — and describes the four points on this level (LU1, ST14, KI26, CV20) as following the slight curve of the first intercostal space rather than a straight line.

?FAQ

Where exactly is Zhongfu?

Upper front chest, level with the first intercostal space, 6 cun from the front midline. It sits just outside the infraclavicular fossa, where Yunmen (LU2) lies.

How do I find Zhongfu?

Find Yunmen (LU2) first. Run a fingertip along the underside of the clavicle toward the shoulder until you meet the coracoid process; LU2 is the hollow just inside it. Find the height. The horizontal ridge near the top of the sternum (sternal angle) marks the second rib. The rib gap just above it is the first intercostal space. Find the width. Go out 1.5 times the midline-to-nipple distance (4 cun) and stop where this line meets the gap. In women, use the midclavicular line as the 4-cun line instead of the nipple, as the standard does for other chest points. it lies roughly a short way straight below LU2.

What should I watch out for?

The pleura and lung lie just beneath the chest wall here. Do not jab with pointed tools or dig in deeply. If you suddenly become short of breath or have chest pain, do not try acupressure — call emergency services or get medical care. Avoid broken or swollen skin and press only to a comfortable level. Acupressure is not a substitute for medical care.

← Previous meridianQimen · LR14Next →Yunmen · LU2
Sources

Positions computed from the WHO standard locations (2008) on Z-Anatomy (CC BY-SA 4.0) · BodyParts3D © DBCLS. For reference only — not a substitute for diagnosis or treatment. See a clinician if you are unwell.