Pressure can be applied to any part of your body and you should feel substantial.
This substance is tangible but not rigid in any way.
You must always yield when pushed and never resist the incoming force.
The connection must exist without conscious effort.
If you need to employ effort, then the peng is not inherent and will not be there in every movement.
Inherent peng needs to be increasingly subtle. Work at yielding to even the slightest degree of force.
Let your body soften, relax and find internal space.
The greater the yielding, the more scope you have for application.
Seek to sustain central equilibrium without any use of force.