1, The following clip, starts 4.58/10.00 is exactly the type of old red boat Wing Chun Chi Sau which found in older Wing Chun family such as the Cho family and YKS.
http://www.youtube.com/watch?v=QadGs...eature=related
2, after this chi sau section, one can see the soft of White crane. that is similar to the crane playing with its wings. however, this is not the path Wing Chun's designer took.
Wing Chun took the Emei snake path where the finger and wrist part is tracing circle, where the other parts of the body limps/ joints is waving in an "S" shape. the tracing circle is what it is call the worm move, where the S shape trajectory of the body limps is called snake slide.
That is what a Worm move snake slide is about. that is the Snake engine of WCK.
Due to this different engine, the power, power generation and structure handling of WCK is different with the White Crane as shown in the clip.
So, it is more then just the intention or Nim Lik or triangle most of us think. the snake engine bring WCK into a dynamic structure platform.
So, for the set of WCK, if it is not practice with the snake engine, it will default back to White Crane.