Cǎi, Liè, Zhǒu, Kào (採挒肘靠) are the Four Corner Hands (四隅手 Sì Yú Shǒu) of Tàijíquán. They form the second half of the Eight Gates (八门 Bā Mén) within the Thirteen Postures (十三势 Shísān Shì). Where Péng, Lǚ, Jǐ, and Àn establish the cardinal grammar of receiving and returning force, the Four Corner Hands train diagonal change, close-range adaptation, and smaller circles.

These four methods are often translated as Pluck, Split, Elbow, and Shoulder. The translations are only starting points. In Tàijíquán they are Jìn (劲) qualities: trained expressions of whole-body force that appear when timing, angle, distance, and central equilibrium are already being tested.

Position in the Thirteen Postures

The Thirteen Postures combine eight hand methods with five stepping methods. The eight hand methods are divided into two groups:

The Four Corner Hands are called "corner" methods because they operate through oblique lines rather than simple forward, backward, left, or right pressure. They often appear when a partner's force does not fit the clean cycle of the Four Primary Hands. The practitioner changes angle, shortens the circle, and uses the nearest useful part of the body without losing center.

This makes the Four Corner Hands more demanding than they first appear. If the body is disconnected, Cǎi becomes pulling, Liè becomes twisting, and Zhǒu or Kào becomes rough collision. Correctly trained, each method remains soft and rooted.

Cǎi (採) — Pluck

Cǎi means to pluck, pick, or pull down. In Taiji usage, it is a sharp seizing and drawing action that breaks the opponent's line without dragging by arm strength. The visible hand may lead the contact, but the power comes from sinking, waist turning, and angle change.

Cǎi is often felt as a small downward or diagonal extraction. The practitioner receives contact, finds the point where the partner is already extended, and removes support from that line. If it becomes a long pull, the shoulders tighten and the practitioner's own center becomes exposed.

In practice, Cǎi trains:

• seizing without grabbing
• drawing force downward or diagonally
• using waist and root instead of arm strength
• changing the partner's structure before issuing

The key is timing. Cǎi is strongest when the opponent has committed pressure into a line that can be emptied.

Liè (挒) — Split

Liè means to split, rend, or separate. It uses opposing directions within one connected body. One side may lead, open, or draw while the other side issues, presses, or cuts across. The opponent experiences the force as separation.

Liè is not simply twisting the arms apart. The splitting action passes through the whole frame: feet provide root, the waist creates the turn, and the arms express two sides of one movement.

In practice, Liè trains:

• dividing force through opposing directions
• opening and closing through the waist
• using spiral or diagonal change
• issuing without losing the rounded quality of Péng

Liè often appears in form movements that open across the body, turn through a diagonal, or express sudden separation after storing force.

Zhǒu (肘) — Elbow

Zhǒu means elbow. In the Eight Gates it refers to using the elbow as a close-range expression of whole-body Jìn. It appears when the contact has shortened and the forearm or hand is no longer the most useful point of expression.

Correct Zhǒu depends on proportion. If the elbow flies away from the body, the shoulder rises and the center opens. If it collapses too close, the structure becomes cramped. The elbow stays connected to the ribs, waist, and foot so the whole body supports the line.

In practice, Zhǒu trains:

• maintaining structure at close range
• issuing through a bent arm without shoulder tension
• keeping the elbow connected to the center
• adapting when hand techniques have become too extended

Because Zhǒu works at close distance, it must be trained carefully with partners. The principle is to understand range, line, and structure, not to strike carelessly.

Kào (靠) — Shoulder and Body Method

Kào means to lean, rely on, or bump. In Taiji it refers to issuing through the shoulder or another part of the torso when the range has become very close. Many explanations translate it as Shoulder, but the broader meaning is body contact through whole-body alignment.

Kào is not falling into the opponent. A body that leans without root can be led, turned, or thrown. Correct Kào keeps the spine organized, the center settled, and the contact directed through a clear diagonal or entering line.

In practice, Kào trains:

• close-range body connection
• issuing without relying on the hands
• entering through angle rather than collision
• keeping the root while the upper body makes contact

Kào is the shortest of the Four Corner Hands. Used too early, it becomes crude impact. Used correctly, it shows that Taiji power is not limited to the hands.

Relationship to the Four Primary Hands

The Four Corner Hands do not replace Péng, Lǚ, Jǐ, and Àn. They depend on them. Without Péng, Cǎi collapses into grabbing. Without Lǚ, Liè cannot lead force before splitting it. Without Jǐ and Àn, Zhǒu and Kào lack the ability to close, settle, and issue from the root.

The practical difference is range and angle. The Four Primary Hands teach large, clear transformations of force. The Four Corner Hands teach smaller circles, diagonal angles, and closer contact. Cǎi may contain Péng. Liè may grow out of Lǚ. Zhǒu and Kào require the same central equilibrium that supports every Taiji method.

Relationship to Form Practice

In solo form, the Four Corner Hands are usually hidden inside turns, openings, crossings, elbows, shoulders, and diagonal transitions. The choreography may not announce them by name. A downward draw may train Cǎi. A movement that opens two directions may train Liè. A turn with a folded arm may contain Zhǒu. A stepping entry with body connection may contain Kào.

The student should not look for the methods as fixed shapes only. The same posture can express different Jìn depending on timing and intention. What matters is the trained quality: diagonal change for Cǎi and Liè, short-range connected issuing for Zhǒu and Kào.

Relationship to Push Hands

Push Hands makes the Four Corner Hands practical and testable. In cooperative patterns, partners first learn to maintain contact, relax, and follow the basic cycle of receiving and returning force. As skill develops, the contact becomes less predictable: angles change, distance shortens, and openings appear quickly.

At that point, the Four Corner Hands become important. Cǎi can use an overextended line. Liè can divide force when the partner is braced in one direction. Zhǒu can respond when the hand has passed the useful range. Kào can issue when the body has entered close enough for contact through the torso.

The goal is not to surprise or overpower the partner. The goal is to understand when a method is appropriate. Without listening, the method becomes external. With listening, the corner methods arise naturally from the pressure already present.

Common Errors

Pulling Cǎi with the arms. A long arm-pull breaks the shoulder and exposes the center. Cǎi should be short, rooted, and led by the waist.

Forcing Liè through twisting. Splitting is not wrestling the opponent's limbs apart. The two directions must come from one connected body.

Throwing the elbow. Zhǒu should not disconnect from the ribs, spine, and root. A flying elbow is easy to jam or avoid.

Leaning during Kào. Kào uses body contact, but it is not a loss of balance. If the practitioner falls into the opponent, the method has already failed.

Using corner methods too early. The Four Corner Hands belong to moments of angle, compression, or close range. Applying them before the situation calls for them creates unnecessary force.

Treating them as rough techniques. Cǎi, Liè, Zhǒu, and Kào are still Taiji methods. They require Sōng (松), listening, central equilibrium, and whole-body Jìn.

Key Terms

• Sì Yú Shǒu (四隅手) — Four Corner Hands
• Bā Mén (八门) — Eight Gates
• Shísān Shì (十三势) — Thirteen Postures
• Jìn (劲) — trained force or refined power
• Tuīshǒu (推手) — Push Hands
• Zhōng Dìng (中定) — central equilibrium