I must thank you profusely for the kind advice on this subject of Peng-Ji-Lu-An.
I must feel that the discussion be contained in the Push hands context and do apologize for forwarding the questions in the "You Tube of Yang Cheng Fu" forum.
I feel that the experience shown and the expression made from all your replies has greatly educate me and I hope the others on the subject thrown to the forum.
Last week, I had the chance to practice the Peng-Ji-Lu An format again. I discovered that (if I may) in the instance when I am engaging the LU (when I have my left palm under the opponents right elbow) while still in my forward stance, I could break the opponent spine. (really dangerous). Instead of rolling back, all I need to do is apply a fast and hard jerk (twisting the opponent's right arm ) I could probably break his spine or his left knee. Is this allowed in competition?
This is my second exposure to the Peng-Ji-Lu-An push hand form and i am getting the gist of it. However, it will take many more effort to be really good at this technique. More so when I do not have the feel of my internal energies as some would have felt. I am still searching for a master who can part this energy teaching with me.
Thank you very much for your kind contribution and advice.