Wing Chun’s third form is Biu Sze.  It’s use of short and long range attack and defence techniques.  Darting fingers power is between finger and elbow.  Elbow technique in the third form is vertically from top down, Chinese called Kai.   Biu Sze is an extension of the whole hand combine with elbow technique and stance with flexible application.  Third form kicking technique especially circling leg focuses on leg power and stance stability.  From First form to Third form there are many detail that can’t be explain here, further elaboration will be provided during class times.