Ba Men (八門) — The Eight Gates

Ba Men (八門), the Eight Gates, is the classical inventory of the eight fundamental jin (勁, trained energies) of Taijiquan. The art's entire active vocabulary — what the body can do with an incoming or outgoing force — is organized through these eight categories. They are not eight techniques in the choreographic sense, but eight flavors of force, a complete grammar that the practitioner expresses through any posture, transition, or contact in push hands.

The eight are conventionally listed in two groups of four. The four cardinal gates (四正勁, si zheng jin) — peng (掤, ward-off), lu (捋, roll-back), ji (擠, press), and an (按, downward press) — are the primary energies, those that dominate the form and the early stages of push hands and that account for most of the art's solo and partner training. The four corner gates (四隅勁, si yu jin) — cai (採, pluck), lie (挒, split), zhou (肘, elbow), and kao (靠, shoulder) — extend the vocabulary into closer ranges and oblique angles; they are the corners that fill in the gaps the cardinals leave.

How the eight are introduced

In a complete curriculum, the gates are not taught as a list. Each one is encountered first as a shape — a posture in the long form, or a transition between postures — long before it is named as an energy. The student learns the wrists crossed at solar plexus before they hear that this is ji; they roll the partner past their centerline before they hear that this is lu. The form, in this sense, is a slow preparation: the body learns the eight before the mind catalogs them.

Only later, in the Ba Men form series — a sequence that walks through the gates in order — does the practitioner study each gate explicitly. Ba Men Form: Peng Lu Ji An establishes the four cardinals as isolated, named energies. Ba Men Form: Cai and Lie adds the first two corners. Continuing sequences add zhou and kao until all eight are present, named, and trainable as discrete qualities.

After this isolation phase, push hands integrates the eight: each becomes a question and answer the practitioner can offer or receive. The early stages exchange one or two gates between partners; the later stages open to all eight at once. The classical phrase for full fluency is smart hands (聽勁 also known as ting jin applied to the eight) — a stage at which response is no longer chosen but emerges from the situation, with whichever gate the moment calls for.

The four cardinal gates

The cardinals are the primary set. They appear together in Grasp Sparrow's Tail (攬雀尾, Lan Que Wei), the four-posture sequence that opens every long form's substantive content: peng → lu → ji → an. The order is not arbitrary. Peng receives an incoming force into a buoyant structure; lu yields and redirects it past the centerline; ji issues forward into the gap the redirection has created; an sinks downward through what is left. Together they describe a complete defensive-and-issuing cycle.

• Peng (掤) — Ward-off. Buoyant outward fullness. The mother of all other jins: lu, ji, and an each express peng turned in a different direction and collapse without it underneath.

• Lu (捋) — Roll-back. The yielding redirection that captures incoming force and leads it past the body toward a corner.

• Ji (擠) — Press. A triangulating, two-directional force that converges on the opponent's center.

• An (按) — Press downward. A sinking force that compresses an opponent's structure into the ground, not a forward shove. Reciprocal with peng: peng floats the partner to sever their root, an then sinks them.

The four corner gates

The corners extend the vocabulary into the diagonal angles and closer ranges that the cardinals do not reach. They become available when the cardinals alone are insufficient — when the partner's structure has closed off the straight lines that peng-lu-ji-an work along.

• Cai (採) — Pluck. A sudden seizing downward pull that uproots the partner by hijacking their forward commitment and dropping it into emptiness.

• Lie (挒) — Split. A two-direction force that pulls apart the partner's structure along opposing vectors, often issued together with cai.

• Zhou (肘) — Elbow. Strike, press, or wrap with the elbow at close range, when the partner is inside the reach where the hand can act.

• Kao (靠) — Shoulder. The body strike: shoulder, hip, or back, applied when the partner is closer still than the elbow can reach.

Sifu Adam Mizner's articulation of the system makes a useful structural point about the corners: they exist precisely to compensate when peng is not yet full enough. A practitioner whose peng is mature has less occasion to need the corners, because the cardinals do more of the work. A practitioner whose peng is incomplete falls into the corners more often, because the diagonals can succeed where the straight gates would have collapsed.

The Thirteen Postures

The Eight Gates are half of a larger framework. Combined with the Five Steps (五步, Wu Bu) — advance, retreat, look left, gaze right, and central equilibrium — they form the Thirteen Postures (十三勢, Shi San Shi), which the classical literature presents as the structural skeleton of the entire art. The eight energies are classically mapped to the eight trigrams (八卦) of the I Ching, and the five steps to the five elements (五行) — tying the physical vocabulary of the art back to the cosmology its name invokes. [1]

This mapping is not decoration. The Eight Gates / Five Steps framework is the canonical answer to the question what is Taijiquan made of? — the irreducible vocabulary that every style, every form, and every push-hands exchange draws from.

Related concepts

Jin (勁) — trained force, the substrate of which each gate is an expression

Peng (掤) — ward-off, the first gate and underlying quality of all others

Lu (捋) — roll-back, the second gate

Ji (擠) — press, the third gate

An (按) — downward press, the fourth gate

Song (鬆) — the release without which no gate works

Sources

[1] Wang Zongyue (王宗岳), Taijiquan Lun (太極拳論) and the Thirteen Postures Treatise (十三勢歌訣). The mapping of the eight gates to the eight trigrams and the five steps to the five elements is canonical in the Taiji Classics and is shared across all five family lineages.

[2] Adam Mizner, Discover Taiji curriculum — the formulation that the four corner gates compensate when peng is not yet full enough is a recurring structural point of his transmission.