---
title: "Concepts & Principles (拳理) — the ideas behind the movement"
---

Styles are the *vehicles*; this section is about the **principles they all share** — the ideas a practitioner of any northern art keeps running into: trained force, standing practice, the elemental theory, martial ethics, and the cultivation language of *qi*. These concepts usually live buried inside individual style pages; here they get their own treatment, honestly framed and cross-linked to the arts that use them.

<Callout type="warning">
  **A word of caution.** This is the part of the martial arts where romance and overclaim run highest — where ordinary trained skill gets described in the language of mysterious energy. The pages below aim to explain each idea **as practitioners actually use it**, separate the trainable mechanics from the metaphysical packaging, and say plainly where a claim cannot be verified.
</Callout>

## Force and power

<PageRef space="notes" slug="jin" text="Jin (勁) — trained, refined force, and the taxonomy of jins (listening, neutralizing, issuing, whole-body)" />

<PageRef space="notes" slug="zhan-zhuang" text="Zhan Zhuang (站樁) — standing-post practice, the quiet foundation under Xingyi, Yiquan and the internal arts" />

## The theory of the internal arts

<PageRef space="notes" slug="five-elements-twelve-animals" text="Five Elements &amp; Twelve Animals (五行十二形) — the elemental and animal framework that organizes Xingyi" />

<PageRef space="notes" slug="internal-vs-external" text="Internal vs External (內家 / 外家) — the most argued-over distinction in Chinese martial arts" />

<PageRef space="notes" slug="neijia-quanfa" text="Neijia Quanfa (內家拳法) — the older 'internal boxing' of Wang Zhengnan, before Taiji took the name" />

## Technique and conditioning

<PageRef space="notes" slug="four-gates" text="The Four Gates (踢打摔拿) — kick, strike, throw, seize: the categories every complete art must cover, including Qinna and Shuai Jiao" />

<PageRef space="notes" slug="yijinjing" text="The Yijinjing (易筋經) — the 'sinew-changing' conditioning classic at the root of the Shaolin legend" />

## Cultivation and ethics

<PageRef space="notes" slug="qi" text="Qi (氣) — what the word means in the martial context, and how to talk about it without pseudoscience" />

<PageRef space="notes" slug="wude" text="Wude (武德) — martial virtue: the ethical code, what's genuinely old in it and what's modern" />

## See also

<PageRef space="notes" slug="northern-styles" text="Northern Kung Fu Styles — the arts that put these principles to work" />

<PageRef space="notes" slug="source-texts" text="Source Texts — the manuals where these ideas were first written down" />