10 Essential Points
1. Keep the head upright as if suspended from above.
2. Depress the chest and raise the upper back.
3. Relax the waist.
4. Distinguish between substantial (solid) and insubstantial (empty)
5. Sink the shoulders and elbows.
6. Use the mind and not force.
7. Co-ordinate the upper and lower body movements.
8. Unify internal and external movements.
9. Maintain continuity of movements.
10. Seek stillness in movement.