Fanbeichui can be called 'backfist' in English. It comes from deeper down in the body than the usual backfist. It is thrown out from the back. One of our lineage members is known for knocking out a thief twice his size with this technique. It is one of the mother abilities, growing out of the dragon's single palm change.
It is unusual in baguazhang in that it uses a fist, but its power grows naturally out of the dragon single palm change. It is used along with stepping to apply a technique when it seems like the back is turned to the opponent. You turn your back a little, which changes the situation, so you attack when you appear to be losing. Because we spend so much time walking in circles, we have already developed the power of the turn, we just need to understand how to throw the fist while keeping it fully connected to the legs and body. It is not a snapped backfist.
Eagle way of doing fanbeichui
Power release drills
Partner training drills
Sparring drills
