Round and round it goes. A technique can be countered and a counter in turn countered.
This is why we emphasize the use of circles especially circles within circles in playing the push hands game. In this manner we can stick and adhere, open and close without panicking when we find our training partner entering our space to attack us.
To learn to use emptiness as a strategy to lure our training partner we must give ourselves up and be willing to be attacked. We must then be patient and wait for the attack to come and to let it come deep enough so that our training partner cannot pull back when he senses our counter. This is why we must study the 5-Count deeply to cultivate the ability to let our partner move first in his attack but we arrive first in our response.
Case in point – when my training partner seals my forward arm with his rear pressing hand and attack strongly with his forward arm to my neck I let him come without trying to fight him off with wasteful strength. In this way he keeps entering into my space not suspecting its a ploy.
When his attacking arm is sufficiently near my neck and before he can issue force I suddenly spring the trap and his force falls into empty space compromising his balance at the same time. Before he can react to pull back I enter with a shoulder stroke to his ribs and bounce him back with a forceful strike.