Zhuan Shen Tui Zhang is named after its form of movement－――turning the body and then pushing the palm.

Detailed Explanation
Take Left Side as an example.
Lower limbs: Buckle the left foot and turn the body right backward around the left heel and right sole; step forward with the right foot, and move the left foot in the same direction to form a left "T" shaped stance.
Upper limbs: As the body is turned, drop the right palm to the front of the abdomen via the right chest, and furt the left palm to the left ear side from obliquely behind the left shoulder; as the right foot is moved forward, have the left foot follow it to form into a "T" shaped stance, and sweep the right palm over the right knee till the right crotch side, with the palm facing downward and fingertips facing upward; push the left paim forward, with the palm facing forward and fingertips pointing at the nose tip.

Key Point
When turning the body, keep the neck muscles, waist and crotch reiaxed and make sure that two feet are in distinctive empty and solid stances; when stepping forward, keep the center of gravity steady and the crotch sunk; move the trailing foot flexibly in harmony with the movement of pushing palm; when holding postures, bend the knee and keep buttocks down, with the knee of the supporting leg pointing at tiptoes. The distance between two feet is about 10 cm.

Elusive and disguised, this form uses the fist to guard beneath the elbow, poised to defend against the opponent and protect oneself. It implies watch, defense and readiness to move.

Key Point
Make sure that the whole body is in harmony up and down. With the head uplifted and the waist upright, use the waist to drive two arms, eyes following the leading hand. When holding postures, keep the head uplifted, the neck upright, the back broadened and the armpits empty.

Detailed Explanation
Lower limbs: Take a crescent step left forward with the left foot, move the right foot a hatf step in the same direction, and transfer weight onto the right foot with the knee slightly curved; step forward with the left foot, with the left heel landing on the ground, and raise tiptoes to form into a left empty stance.
Upper limbs: As the left foot is moved forward, move the left palm upward and leftward in front of the body from before the abdomen, through beneath the right forearm, until the head height, and circle the right palm from before the right chest to the left chest down to the right side of the crotch; as the right foot foliows the left one, continue to circle the left palm leftward and downward to the left side of the body, and circle the right palm right and forward to the front of the body (with the palm obliquely facing upward); when the left foot moves forward into a left empty stance, turn the left palm to an inclined standing palm and strike it out forward over the right wrist, with fingertips reaching the eyebrow height, turn the right palm into a ftst before the body and take it back to beneath the left elbow, with the eye of fist facing upward; keep the upper part of the body upright, with the chest facing forward in a slightly oblique way, eyes looking at the left palm.

See (Zuo) Dan Bian for detail.

Key Point
See (Zuo) Dan Bian for detail.

Detailed Explanation
Lower limbs: Take a right step with the right foot and transfer weight onto the right leg to form an L-shaped stance.
Upper limbs: Turn two arms inward , slowly part them to left and right respectively, and curve two arms slightly, with two palms outward in a standing way straight before the eyes, eyes looking at the left hand.

Specific to the Sun-style Tai Chi Boxing(traditional chinese kung fu), Kai He Shou is named after the opening and closing movements of hands.

Detailed Explanation
The opening and closing movements of hands in the 42 Forms are typical of the Sun-style Tai Chi Boxing.
Lower limbs: Stand with the feet parallel, one empty and the other firm (knees bent slightly); hold weight onto the left leg, and lift the right heel.
Upper timbs: Sink the elbows with two palms opposite to each other, open hands left and right  before the chest until a shoulder width, with weight slightly transferred onto the right leg, eyes looking forward; as weight is transferred to left, close  hands inward until a face width, eyes looking at the middle between two palms.

Key Points
When opening and closing hands, there should be a sense of reeling between two palms; the change in empty and solid stances between two feet should be in harmony with the opening and closing  movements of hands; in the empty stance, the heel should be slightly off the ground.

Cross two arms to form an oblique  ‘‘十’’shape, resembling a seal. The movement of withdrawing one hand while horizontally prodding the other hand is called  "Feng" (seal), while the movement of bending two elbows and pushing hands out is called "Ge"  (parry, block). It seems to close a two-leaf door when two hands are tumed and pushed forward. In Tai Chi Boxing, the action of the two types of movement is termed  "Feng Ge Ji Bi Fa"   (the method of arm sealing and parrying).

Key Point
Keep the head uplifted, the shoulders sunk, elbows down, and the waist relaxed, and ensure that the hand movements of Feng, Ge, Bi (close) and Tui  (push) are in harmony with the movement of the lower limbs' weight.

Detailed Explanation
The 42 Forms have some features shared with the Yang-style and Sun-style Tai Chi Boxing.
Lower limbs: Transfer weight backward to form into a left seating stance from the left bow stance, with left tiptoes hooked upward; transfer weight forward, take the right foot back to behind the left foot to form a right T-shaped stance, with tiptoes landing on the ground.
Upper limbs: Thread the left palm from beneath the right forearm, palm upward; turn the right fist into palm facing upward; as weight is transferred backward to form into a seating stance, part two palms, curve arms and turn them inward, and draw them back to the chest at a shoulder width, with the palms obliquely opposite to each other. Turn two palms downward to the front of the abdomen, and as the right foot follows, push two palms forward at a shoulder width, wrists level with the shoulders and eyes looking at two palms.

As the name implies, Ban Lan Chui of tai chi boxing, where Ban means "move" and Lan  "block" , means that in defense and attack terms, the palm is used to move the incoming fist left or right so as to block the opponent' s attack, and the fist is used to attack the opponent's ribs or chest.

Key Point
Use the waist to drive two arms for defense and attack. When parrying, keep the heat uplifted, the shoulders sunk, the waist upright and the crotch down, strike out backfist with the elbow joint as pivot, while transfer weight forward.

Detailed Explanation
Lower limbs: When performing the Ban movement, step the right foot forward to form into a right empty stance, with the right heel landing on the ground and tiptoes hooked; when performing the Lan movement, step the left foot forward to form into a left empty stance, with the left heel landing on the ground and tiptoes hooked; when performing the Chui(punch) movement-rtransfar-weight forward to form into a left bow stance.
Upper limbs: When performing the Ban movement, turn the right fist with the elbow as pivot and move it forward along the inside of the left arm, with the palm side of the fist upward above the chest height; push the left palm to the left crotch side, eyes looking at the right fist: then as the body turns right, take a left step, turn the left forearm outward, circle the left fist from left to the front till the front of the body with eyes looking at the left fist, and take the right fist back to the right side of the waist, with the palm side of the fist upward; form into a bow stance, and throw a punch forward with the right fist. Turn the eye of fist upward to the chest height, and take the left palm back to the inside of the right forearm, eyes looking at the right fist.

This posture is named after the two hand techniques---Lu (Roll Back) and Ji (Press). A very important form of tai chi chinese martial arts.

Key Point
Horizontally smear the palm as the foot is buckled and the weight transferred forward to form into the bow stance; take the rear foot back when rolling back two palms; press two arms forward as the bow stance is formed. Roll back gently, and when rolling back downward, keep the head uplifted, the shoulders sunk, the elbows down, and the upper part of the body straight and centered; push forward horizontally as the bow stance is formed. When rolling back and pressing, ensure that the leg be distinctively empty or firm and the center of gravity be kept steady.

Detailed Explanation
Lower limbs: Buckle the left foot and transfer weight forward to form into a left bow stance. Upper limbs: Thread the right palm over the left forearm and circle horizontally from left to right forward with the palm obliquely downward, and turn the left palm outward to beneath the inside of the right elbow, with the palm obliquely upward ; roll back two palms downward from the front, with the left palm down to the outside of the left crotch and the right palm to the front of the abdomen, and at the same time take the right foot back to the inside of the left right; as the right foot is moved right forward to form into a right bow stance, turn two forearms (the left forearm turned inward and the right one outward), curve the arms and lift them up (the palms opposite to each other), and press them forward via the chest, with arms arched, the fingers of the left palm clinging to the right wrist with the palm outward and fingertips obliquely upward, the right palm inward with fingertips pointing to left, at the height of the shoulder. Keep the upper part of the body straight and centered, eyes looking at the right wrist. This form has the same movements for left and right sides, which are simply in the opposite direction.

Pie Shen is also known as  "Shan Shen" ,both translated as "parry" . As the name implies, Pie Shen Chui (Parry & Tum to Punch) of tai chi boxing refers to the slightly horizontal attack on the opponent with the fist by taking advantage of the centrifugal force produced by the arched movement of the fist, using the waist as pivot.

Detailed Explanation
Lower Limbs: Step the left foot obliquely left forward to form into a left bow stance.
Upper limbs: Parry and punch with the left fist after it turns before the abdomen, with the palm side of fist obliquely upward and at the height of the head, and position the right hand to the inside of the left forearm, eyes looking at the left fist.

Key Point
When parrying and punching, use the waist to drive the arm, turn and press down the forearm with the shoulder joint as pivot, in order to increase the strength of the fist.

"Ao Bu"  (Twist Step), a martial art term, means pushing the right or left palm when the left or right leg is ahead so that hand and leg twists left and right. "Lou Xi"  (Brush Knee), a method used to attack the opponent' s lower part of the body, refers to the movement of hand brushing or pressing down the knee. The two postures are used in a combined way.

Detailed Explanation
Lou Xi Ao Bu-Left Side.
Lower limbs: Step forward with the left foot, with the heel falling to the ground; transfer weight forward to form into a left bow stance.
Upper limbs: Bend the right elbow, and take the right hand back beside the ear with the palm obliquely forward; drop the left hand down along right ribs to the front of the abdomen, eyes looking forward. Push the right hand forward with standing palm, with fingertips level with the nose; brush the right hand over the knee to the right crotch, eyes looking at the right palm.

Key Point
Step forward and transfer weight forward to form into a bow stance. Keep the waist relaxed, the crotch down and the upper part of the body centered, and turn the waist in line with the movement of upper limbs. When pushing the palm, use the inclined palm first with fingertips forward, rest the wrist and then change to the standing palm.

Keep the upper part of the body straight and centered, and spread the arms symmetrically left and right, up and down, like a white crane spreading its wings, after which the posture is named. The posture alternatively means spreading one arm and showing two arms as they rise, fall and turn.

Detailed Explanation
Lower limbs: Transfer weight onto the right leg, and take the left foot back to form into a left empty stance.
Upper limbs: Beginning with two hands poised to hold a ball, arch the right hand over the right forehead as the body turns right, and then place the left hand to the inside of the right forearm; as the body turns left place the right hand before the right forehead, palm inward, and arch the left hand via the front of the body down to the side of the left crotch, eyes looking forward.

Key Point
With the head uplifted, the waist relaxed and the crotch down, unfold hands obliquely upward and downward, or straight upward or downward as the waist turns left and right emptily or solidly, which is done in line with footwork.

This is the 5 form of tai chi kung fu, tai chi is a traditional chinese martial arts, if you also like this, read the later articles.