GB21 Jianjing: At the midpoint of the line connecting the C7 spinous process with the lateral end of the acromion. Identify both bony landmarks by palpation. Landmark diagram; not to scale.

GB21 (Jianjing / Shoulder Well) Acupuncture Point Guide

Practitioner Guide from The Acupuncture Supply Co.
Professional acupuncture supplies and practical clinical resources for qualified practitioners in Ireland and across Europe.

GB21, known as Jianjing (“Shoulder Well”), is located in the top of the shoulder. This guide summarises the standard location, traditional functions, common combinations, anatomy and essential safety considerations.

This is a professional reference for appropriately trained practitioners. It is not a self-treatment guide and does not replace accredited anatomical and clinical training.

GB21 Jianjing quick reference

Point name GB21 — Jianjing (“Shoulder Well”)
Channel Gallbladder channel
Classification Meeting point of the Gallbladder, Sanjiao and Stomach channels with the Yang Linking Vessel
Region Top of the shoulder
Laterality Bilateral
Core landmark At the highest point of the shoulder, midway between GV14 on the posterior midline and the lateral tip of the acromion.

Location of GB21 Jianjing

At the highest point of the shoulder, midway between GV14 on the posterior midline and the lateral tip of the acromion.

Use proportional B-cun measurement together with palpation and individual anatomy. A fixed centimetre measurement is not a substitute for anatomical location.

GB21 Jianjing: At the midpoint of the line connecting the C7 spinous process with the lateral end of the acromion. Identify both bony landmarks by palpation. Landmark diagram; not to scale.
GB21 Jianjing — illustrative location reference.

Traditional functions of GB21

  • Moves Qi and Blood and relaxes the sinews.
  • Benefits the shoulder and neck.
  • Descends rebellious Qi in traditional theory.
  • Benefits the breasts and promotes labour in traditional practice.

These descriptions belong to traditional acupuncture theory. They are not claims that GB21 has been proven to diagnose, prevent or treat disease.

Traditional clinical applications

  • Neck and shoulder tension or restricted movement after appropriate assessment.
  • Upper-back or arm symptoms where the Gallbladder channel is relevant.
  • Breast or lactation presentations only within professional scope and with appropriate consent and referral pathways.

Point selection should follow a complete assessment, differential diagnosis, informed consent and an individualised treatment plan.

Common point combinations

  • GB21 + GB20: traditionally used for neck and shoulder tension.
  • GB21 + LI15: considered for local shoulder dysfunction.
  • GB21 + CV17: used traditionally in selected breast or lactation strategies after assessment.

These are traditional examples rather than fixed prescriptions.

Anatomy and practitioner notes

The point overlies the upper trapezius, with the lung apex and pleura lying inferiorly. Shoulder height, muscle bulk and posture vary, so midpoint measurement and palpation are essential.

Needling and essential safety

GB21 carries a recognised pneumothorax risk. Deep perpendicular needling is unsafe, and the point is traditionally contraindicated during pregnancy because of its strong descending and labour-promoting action. Use only within accredited thoracic needling training and individual anatomical assessment.

Use sterile, single-use needles, appropriate skin preparation and a technique suited to the patient’s anatomy, health, medicines and treatment position. Stop and reassess if unexpected sharp, electrical or strongly radiating sensation occurs.

Frequently asked questions

Where is GB21 Jianjing?

At the highest point of the shoulder, midway between GV14 on the posterior midline and the lateral tip of the acromion.

What does Jianjing mean?

Jianjing is commonly translated as “Shoulder Well”. The English rendering helps explain the traditional name but does not replace the anatomical landmark.

Can patients use this guide for self-needling?

No. This resource is written for qualified practitioners and does not replace supervised anatomical and clinical training.

Continue exploring Project Lotus

Visit our Acupuncture Point Guides, or read the GB20 Fengchi Guide and GB34 Yanglingquan Guide.

Practitioners can also browse our professional acupuncture needles and the wider Practitioner Guides library.

Professional disclaimer: This article is provided for qualified acupuncture and healthcare practitioners for general educational purposes. Traditional actions and applications describe established acupuncture theory and are not claims of proven clinical efficacy. It is not medical advice, does not replace accredited training and should not be used as a universal treatment protocol. Practitioners remain responsible for assessment, consent, safe technique, infection control, record keeping, referral and compliance with professional and legal obligations.

Reference standards and safety reading:
World Health Organization. WHO Standard Acupuncture Point Locations in the Western Pacific Region.
World Health Organization. Guidelines on Basic Training and Safety in Acupuncture.
Master Tung’s Acupuncture / eLotus CORE. GB21 Jianjing reference page.

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