Kidney 4 (KI 4) Da Zhong — Great Bell

This is the Luo-Connecting point of the Kidney channel, connecting with the Bladder. It strengthens the Kidney, anchors the qi and strengthens the will (zhi).

Kidney 4 (KI 4) Da Zhong 大鐘 — Great Bell

Location

On the medial aspect of the foot, posterior and inferior to the medial malleolus, in the depression anterior to the attachment of the Achilles tendon to the calcaneus.

Anatomy

Anterior to the Achilles attachment; the medial calcaneal branch of the posterior tibial artery; the medial calcaneal branches of the tibial nerve.

Actions & Functions

  • Strengthens the Kidney and anchors the qi
  • Strengthens the will and lifts depression
  • Benefits urination and the lower back

Indications

Asthma and difficulty breathing, retention of urine and enuresis, lower back stiffness, depression and timidity, and heel pain.

Needling

0.3-0.5 cun, perpendicular insertion.

Moxibustion Suitability

Suitable for moxibustion.

Point Combinations

With BL-64 (Yuan-source pairing) for back and urinary disorders; with KI-3 to strengthen the Kidney.

Classical Text References

The Luo-Connecting point of the Kidney.

Cautions & Contraindications

None specific.

Latest Research

Latest peer-reviewed research on this point will be summarised here, with citations linked to PubMed, via our research integration.

About Attilio

Doctor of Chinese medicine, acupuncture expert and author of My Fertility Guide and My Pregnancy Guide.

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PubMed research

Traditional Chinese Medicine Improves Nutritional Status in Maintenance Haemodialysis Patients, Meta-Analysis Finds

Research summary (Traditional Chinese Medicine): Efficacy of traditional Chinese medicine in improving nutritional status among Chinese maintenance hemodialysis patients: a meta-analysis of - Frontiers in nutrition, 2026.