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.
encyclopaedie
Man sao is the searching hand. It serves as front line to take the first attacks of the opponent. The typical ving tsun guard position is man sao...
The gaan sao is a hand move that reminds of a plough. It moves downwards following the orientation line.