Other points of interest for some:
How Does "Hun yuan li" Works?
Before we lift our back foot up and move it forward, we have to shift our body weight to the front foot, and sit properly on our front leg. We lift the top of our head up, make our front foot gently push into ground and raise our body slightly. That way our back foot is lifted off the ground. We now have to use our hips and our legs to move our back foot closer to our front foot before moving it out to the front and form a fighting stance. Now the front foot becomes the back foot. We will repeat the same process to move the back foot forward again. This is how "mo ca bu" should be done. (When we practice Mo cha bu going backwards, the movements are reverse.)
1) So in Yiquan one should raise the foot by stretching the other leg? One wonders how they manage to perform kicks...
2) The only way I know to move my feet is to use my hips and legs, as the muscles in my feet move the toes. (Unless I'm doing a hand stand or something.
) So as an explanation on how 'mo ca bu' should be done, it is not helpful.
3) What has Yiquan stepping to do with your True Internal Strength?