Relax your waist. The waist is the owner of the suit. According to the boxing theory, "the source of fate lies in the waist gap". There is a gap, that is, the waist has a hip. To loosen the waist, the tail should be in the middle, that is, the end, "attention is quiet." Tai Ji Chuan is based on an upright posture. The human spine bone accounts for 45% of the total length of the human body, showing an S-shaped physiological curve. Do a good job of top suspension and tail winding.

Looseness of human spine bones can enhance physical fitness, delay the low center of gravity and make the footwall stable. If you want to take the left step, you must first loosen your left hip and put your left foot in, which means that your will comes from the waist gap. When Yang Zhenduo taught me, he often put the word "belt" in front of the movements, such as "toe buckle", and all the movements were brought out from the waist and buttocks. If the waist is not loose, and only the hands or feet are moving, it will become a physical movement of radio exercises, not Tai Ji Chuan's "all-around movement".