Correct posture:
The overall feeling is like an iron tower, with a solid "foundation" and an infinitely tall and straight "tower body".
Head: To feel like a "head hanging beam", pull the whole head up.
Chin and neck: the neck pulls the chin and raises it to a horizontal height.
Shoulder: the chest is dilated and the ribs are closed. The shoulders are vertically downward, and the shoulder blades are pulled toward the center of the back.
Waist: Shoulders and waist should have the consciousness of depicting a rectangle, and pelvis should stand up.
Hip and abdomen: the lower abdomen and buttocks should be pulled instantly, and the abdomen should be lifted. Try to make the whole body feel like a "paper man".
Foot: Concentrate your weight on the thumb ball of your foot.