The tan sao is described as a palm up hand. It is an attacking hand oriented forward.
encyclopaedie
The scissors gaan sao is to be considered equally as defensive or offensive move. It protects the whole upper body from waist to head.
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...
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.