The fook sao is the forward controlling hand. Its appearance reminds a praying mantis.
encyclopaedie
The gaan sao is a hand move that reminds of a plough. It moves downwards following the orientation line.
The fung hao is an attack executed with the side of one's hand that will generally be directed to the neck of the opponent. The fung hao is...
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.