When the four component parts (feet, legs, waist, hands) combine to make one harmonious whole. The eyes should follow the action to signal the involvement of the mind.

Comment: The ten pointers for correct practice are usually associated with excellence in form practice, however all can equally be addressed to both application and push hands training. You can refer to the last issue and Yang's important point number six for more detail in the use of the upper and lower body moving in unity. I feel from my own experience that one training route to this body unification/harmony can be found in the regular practice of the Chen style silk reeling.