The fook sao is the forward controlling hand. Its appearance reminds a praying mantis.
encyclopaedie
As kwan sao, we describe a move composed of a tan sao and a deep bong sao. It is a defensive as well as an offensive move.
Wu sao will be described as protecting hand. It is the last line of defense in front of the body, before the attack reaches it.
The bong sao is a defensive helping hand. It serves to change from one side of the opponent to the other, respectively from the inside to the...