pí bù
Also rendered: Skin regions (this site; the surface allotted to each channel, named after the parts of a door) · Cutaneous regions (the usual modern acupuncture term for the same twelve)
Reviewed · 2026-10-02
At a glance
The twelve regions into which the surface of the body is divided, each one belonging to a channel and taking its name from a part of a door: 害蜚 for the yang brilliance, 樞持 for the lesser yang, 關樞 for the greater yang, 樞儒 for the lesser yin, 害肩 for the heart master, 關蟄 for the greater yin. Hand and foot share one rule — 上下同法 — so the twelve are spoken of as six. The regions are not an anatomy but an address: read what lies within them and you read the channel they belong to, and the order in which an evil travels inward is an order through them, from skin to network vessel to conduit to depot. Chapter 56 is the only place in the Suwen where the doctrine is set out as a whole.
Passages where the term does real work, with the original, pinyin and English on the same line.
Every rendering below is a decision about which reader is being addressed. There is no neutral option.
| This site | skin regions | the region a channel answers for on the surface, read by the floating network vessels within it |
| Modern acupuncture | cutaneous regions · 十二皮部 | the standard English of the textbooks, usually presented as twelve rather than six because hand and foot are counted apart |
| Untranslated | pi bu | kept as pinyin where the door-names are being discussed, since the names themselves are left untranslated on this site |
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