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 gaan sao is a hand move that reminds of a plough. It moves downwards following the orientation line.
Biu sao is a forwardly oriented movement, regularly used under the other arm as an emergency attack. It points towards the target one wants to...
The pak sao is discribed as a slapping hand. It's one of the more widely used moves in ving tsun. This move is an excellent preparation for the...