In Ward-off (peng,) Rollback (lu,) Press (ji,) and Push (an,)
one must know proper technique/have proper intent.

Upper and lower body act in unison,
so that the opponent finds it difficult to advance.

Even if the opponent attacks with great force,
Lead his movement, using “four ounces to deflect a thousand pounds.”

Entice him to advance, empty his attack, then issue force (jing.)
Adhere, connect, stick, then follow without letting go or resisting.