I only know a little about Tai Ji Chuan's stake:
When Tai Ji Chuan is practicing, he needs to be weak, shoulder and elbow heavy, chest pulled back, waist loose and buttocks tight ... upright, and relax ... Only in this way can he be keenly aware of the opponent's flaws in attack and defense, make a quick response, arrive first, and win by surprise. Vertical pile is one of the effective methods to achieve this state.
My usual practice of standing piles is: my feet are shoulder-width apart, my knees are slightly bent, my arms are bent in front of my chest or abdomen, the distance between my hands is about 10 cm, and my fingers are opposite.
Then adjust your figure: keep your head straight, your chin miniature, your ears flat, your shoulders at the same height and your hips at the same height. ...
Then adjust your spirit: look straight ahead with your eyes lower and listen straight with your ears higher. Bai Hui virtual virtual led up. ...
Then relax: check from the top of your head and relax one by one until your knees and ankles are firmly on the ground.
Repeatedly check, adjust and experience the feeling of relaxation and alignment. By this time, you should have achieved the purpose of back support, shrinking across the roots and hanging your hips like a bell hammer. ...
Experience the feeling of "empty collar, heavy shoulders and elbows, chest and back pulling, loose waist and buttocks" ... stand straight and relax ... ",the feeling of being alone, the feeling of being armed with five bows and so on.
At this time, the relaxation is not soft, but the whole body is a whole, in a state of "not loose, not show".
There are not only quiet Gong Zhuang, but also touching Gong Zhuang.
Standing piles is not only an effective way to practice basic skills, but also an effective means to keep fit.
The standing pile of Waijiaquan may be mainly a horse stance just look pile. I don't know the point.