I had an interesting discussion with my Choy Lay Fut Sifu the other night over dinner. He said in any close contact Chinese martial art there are 4 energies, Float, Swallow, Spit and Sink. I thought about it and these sounded alot like Peng, Lu, Ji and An. The four energies of Taiji. He does Yang Taiji on the side and he said that these energies were basically the same thing. Anyone have any thoughts on this?