Interlock your hands with your fingers, make a fist, straighten your arms forward, and bow your back. Look for the feeling that the upper back wraps around the chest.

Step 2: Practice chest forward and backward. Hold the door frame, inhale forward, exhale backward, and keep your shoulders still.

If you feel it, let go of your hands and practice your chest forward and backward.

Step 3: Stretch your chest left and right and move your shoulders.

Step 4: Make round breasts. Practice in points first: front, right, back and left. Practice a few slow eight beats first, then practice fast eight beats, and finally practice some more. Whenever you can't find the feeling, repeat from the first step and then practice in the opposite direction.

The difficulty of horizontal round chest is that the lower body should be stable, and the chest can only move, not the waist, arms and shoulders. Warm-up before each movement will help the movement to be smoother. Beginners will feel uncomfortable, so just practice more.