What we describe as jum sao is the sinking elbow. This minimal move protects the under part of the upper body like belly and liver.
encyclopaedie
The jut sao is executed with the inner part of the wrist and serves as a preparation for further attacks like a punch or a fung hao.
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...