I feel a mass of air in my abdomen pushing from top to bottom or from bottom to top. Just stick to 50 to 100 yuan every day ... and then make this movement smaller ~ so that your stomach will roll ||| inhale, slowly move the air from below the abdomen to the abdomen, and then move the abdomen from the abdomen to the abdomen. Repeat the above steps ||| Stand facing the wall with your body about 10cm away from the wall. Let the chest, abdomen and waist stick to the wall in turn. Note: when the chest sticks to the wall, the waist leaves, when the abdomen sticks to the wall, the chest leaves, and when the waist sticks to the wall, the chest leaves. I practiced for many times, even sitting, moving as long as I want, and I don't have to move anywhere except my stomach.