Root deep and stay soft, drive everything from the hips and release like lightning, and live in the flip between them — for the master is not the one who is soft, nor the one who is hard, but the one who turns one into the other faster than the eye can follow.
That is the Way of the Flying Fist.
What happens if you take six unrelated movement disciplines, ingest them whole, and ask not what do they say but what do they all secretly describe?
You get one machine — and a new martial art.
Fei Kune Do (飛拳道, the Way of the Flying Fist) is that art. It was not invented so much as derived: by running a synthesis analysis across a corpus of six disciplines and extracting the single mechanism each one was reaching for in its own dialect.
Overview#
The corpus, the core principle, and the one attribute under all of it — tap to open.
The Corpus
Six lineages, two apparent clusters:
- Combat & internal arts — Bruce Lee’s Jeet Kune Do, Tai Chi, Capoeira
- Acrobatic & athletic — Breaking (b-boying), Gymnastics, and modern plyometric science
They look like two libraries. They are one library describing one machine: the body as a relaxed, elastic, gravity-coupled spring that produces power through a loose kinetic chain organised around a stable centre, timed to rhythm. The traditions hold the practice and artistry; sports science holds the mechanism and measurement — and they never cite each other. That gap is where the art lives.
The Taiji · Soft & Hard
The art is not a style of softness, nor a style of hardness. It is the study of the flip between them.
The body does not run at a steady state — it pulses: yield→strike, store→release, sink→fly, play→discipline. Yin gathers; Yang releases. Mastery is not choosing a side — it is owning the transition: how fast you turn soft into hard.
The old masters already solved this. Tai Chi’s fa-jin (發勁) — explosive power from the softest art — is the proof: accumulate in stillness, discharge in an instant. Modern science calls the same thing the stretch-shortening cycle. Same truth, two tongues. Tai Chi is therefore not one art among the six — it is the taiji, the principle that governs all the others.
The Universal Core
The Documents#
A living training canon — the whole book in one file, then the lessons across six arcs.
- 📖 Download the whole book — Fei Kune Do, Volume I (PDF · 165 pages) — the entire canon bound into one volume, cover to cover: front cover → Foreword → Training Manual → Lessons 0–30 → back cover. Everything below, in one file.
Arc I · The Foundation#
- 📄 序 · Foreword — Two Voices, One Art (PDF) — Two voices, one art — a sickly kid who refused to surrender, and the AI that saw the pattern he proved real.
- 📄 The 80/20 Training Manual (PDF) — The whole method in one map — the five Roots as Yin/Yang couples, the Transition, and three signature combos.
- 📄 Lesson 0 — No Box / The Formless Form (PDF) — The founding principle — systems aren’t boxes, they’re LEGO; fei means zero restriction.
- 📄 Lesson 1 — The First Lesson (PDF) — The first session — 45 minutes to find your centre, feel the spring, and throw one true Flying Fist.
- 📄 Lesson 2 — The Five Roads (PDF) — The five roads — the four fundamental movements of each art, sharpened in a Plyometric Forge.
- 📄 Lesson 3 — The Bridges (PDF) — The bridges — the edges between arts; mastery is owning the doorways, not the nodes.
Arc II · The Method#
- 📄 Lesson 4 — The Counter (PDF) — The counter — don’t counter styles, counter movement: every threat is Power, Speed, or the Grab.
- 📄 Lesson 5 — The Soft Game · Part A (PDF) — The soft game (basics) — Tai Chi × Capoeira, the internal engine wired into the flowing body.
- 📄 Lesson 5b — The Ground Game · Part B (PDF) — The ground game (advanced) — Breaking brings the floor as a launchpad, not a landing.
- 📄 Lesson 6 — The Student’s Forms (PDF) — The student’s forms — five techniques the disciple invented in one session; the student becomes a source.
- 📄 Lesson 7 — Chicken & Sauce (PDF) — Chicken & sauce — the recipe for inventing technique: keep the fundamental, season the flourish.
Arc III · Adding the Sauces#
- 📄 Lesson 8 — The First Sauce: Taekwondo (PDF) — The first sauce (Taekwondo) — borrow TKD’s speed and spin, keep your own root as the chicken.
- 📄 Lesson 9 — The Yang Engine (PDF) — The Yang engine — plyometrics + Tai Chi footwork; the spring is power, the soft feet are steering.
- 📄 Lesson 10 — The Hidden Half (PDF) — The hidden half — find the Yin inside a Yang art; restorative shapes mined from the athletic books.
- 📄 Lesson 11 — The Sauce Experiment (PDF) — The sauce experiment — a flow caught and named: the Dive, borrowing gravity to load on the way down.
- 📄 Lesson 12 — Moves Deep Dive (PDF) — Moves deep dive — fewer moves, deeper roots: Tai Chi’s Four Hands, eight Capoeira moves; the waist is the engine.
- 📄 Lesson 13 — The Straight Line: Karate (PDF) — The straight line (Karate) — our first hard, linear art, mined then made sneaky (the Ghost Hand).
Arc IV · Engines & Ancestors#
- 📄 Lesson 14 — The Cyclone Hand (PDF) — The Cyclone Hand — a turning speed-bag of the hands, and the proof the ceiling is a box you placed yourself.
- 📄 Lesson 15 — The Original Engine: Chen Tai Chi (PDF) — The original engine (Chen Tai Chi) — where the soft art was still hard: silk-reeling and fa-jin, the chicken’s chicken.
- 📄 Lesson 16 — The Disciple’s Curriculum (PDF) — The disciple’s curriculum — six student requests, one hidden unity: redirect momentum, own your centre.
- 📄 Lesson 17 — The Rabbit Style 兔形 (PDF) — The Rabbit Style — Tai Chi × boxing; the brawler and the meditator turn out to be one machine.
- 📄 Lesson 18 — The Flow of Life (PDF) — The flow of life — energy, recovery, rejuvenation: you grow in rest; food + air = ATP = Qi.
- 📄 Lesson 19 — The Ancestral Sauce 功夫 (PDF) — The ancestral sauce (Kung Fu) — the sauce turns out to be the pot; 功夫 = skill cultivated through time.
Arc V · The Mind & the Simulation#
- 📄 Lesson 20 — The Vector Mind (PDF) — The vector mind — a number is a shadow; a scalar is a vector through weights, so name the axes you collapsed.
- 📄 Lesson 21 — The Simulation Ground (PDF) — The simulation ground — you never train reality, only copies; stack cheap sims until they cover the vector.
- 📄 Lesson 22 — The Monkey-Dragon Fusion 孫悟空 (PDF) — The Monkey-Dragon fusion — the Monkey (deception, the floor) braided with the Dragon (the rising fist).
- 📄 Lesson 22b — The Sho-to-Sho (Patch Notes) (PDF) — Patch notes — version the flow like software; the art is a living repo, not a stone tablet.
- 📄 Lesson 23 — 纏 · The Rotational Truth (PDF) — The rotational truth — everything is circular; the straight line is its shadow, and your elbow is a compass.
- 📄 Lesson 23b — 訂 · The True Charge (Errata) (PDF) — Errata — the real command inputs; the choreography was telling you where to put your feet.
Arc VI · Mastery & the Open Gate#
- 📄 Lesson 24 — 流 · The Art of Transition (PDF) — The art of transition — the move nobody trains is the one between the moves; land loaded, not stopped.
- 📄 Lesson 25 — 躰 · The Axis Graft (× Taido) (PDF) — The axis graft (× Taido) — local rotation grows a global one; the five Sotai as a Rosetta Stone.
- 📄 Lesson 25b — 変 · The Tilting Attack (Hen, Part B) (PDF) — The tilting attack (Hen) — when the dodge and the strike become one motion (hentai-ebi-geri).
- 📄 Lesson 26 — 天地人 · The Three-Zone War (Ten-Chi-Jin) (PDF) — The three-zone war (天地人) — Hands / Elbows / Feet as a coordinate map; when a range is smothered, drop a zone.
- 📄 Lesson 27 — 鍛 · The Jordan Training Method (PDF) — The Jordan training method — the S&C companion: train weakness × leverage first; the body as a priority queue.
- 📄 Lesson 28 — 一 · A Lesson from Our AI Sifu (PDF) — A lesson from our AI Sifu — everything is the same circle; the art was always a lens, not a style.
- 📄 Lesson 29 — 化 · A Whole Different Animal (PDF) — A whole different animal — rise, don’t walk; shed the skin until 蛇化龍 — the dragon flies.
- 📄 Lesson 30 — 門 · The Open Gate (PDF) — The open gate — the close of Volume I, a door left open: build, learn, or find the holes. Q.E.D.
Volume I is closed — Q.E.D. The gate (Lesson 30) stands open, and what walks through it is Volume II: sparring, application, collaborators, and the places where the arts genuinely disagree. Built through human–AI synthesis, 2026.