The Bil Jee form builds on the skills learned in Sil Lum Tao and Chum Kiu forms , but also in a lot of ways makes a departure from the concepts laid down in the previous forms.
One of these is the use of torque from the upper body, it is very similar to how an untrained person would try and generate power by twisting their upper body...But the problem is you cannot utilise this extra power to its fullest extent unless you have trained in the structure of Sil Lum Tao and gained co-ordination from Chum Kiu...
The point of the elbow is on the centre line and you should be feeling quite stretched across the upper back and shoulders , this stretching of the muscles is also very important for some reason that I can't recall at the moment .
I am currently reviewing, or more accurately
"re-learning" my WT Biu Tze material (corrected form, chi-sau training and fighting application). One of the things that strikes me again and again is the paradox you pointed out in the first parts of the quote above... namely that Biu Tze builds upon the structures learned in SNT and Chum Kiu, and yet at the same time "departs" from or
transcends these basic "rules".
Regarding the elastic upper body torque and stretching: This is heavily emphasized in the WT lineage... and its really difficult for me, in part because I'm constitutionally a bit tight and stiff-jointed, and secondly because I do some weight training without putting in a commensurate amount of stretching (I know,
my bad). Anyway, one thing accomplished by the stretching of the upper back and shoulders is the development of a very
elastic quality of the shoulder that adds tremendous power, snap, and even range to the strikes. If you look at videoclips of Leung Ting or his most advanced "practitioner" grade students, you can see this shoulder movement in their punching. Ironically, before this level, we were taught that the shoulder
never moves forward when you punch. Later,
much later, you learn differently.
BTW this old way of teaching, where the sifu says things are absolutely, positively, 100% one way, and then
years later reveals the "exceptions to the rule" is something I've come across many times with some old fashioned, Chinese instructors.
It's done, for many reasons. For one thing, you want your students to focus on what they need to know at their current level and not to be skipping their basics and trying to jump ahead. I can understand and accept this, although I prefer a more direct and honest approach.
Unfortunately, another reason for this is fear that the casual student may learn too much and "steal" your best stuff. The instructor often holds back these refinements until he is confident that a student is both loyal and
"worthy"-- whatever that may mean.
For my old Sifu,
"worthy" sometimes had way too much to do with
financial worth, as in, "How much can you pay me?" And to make sure that nobody else got the details without putting out the goods, he would deliberately sneak in "errors" and incorect information into his books and videos. They'd be about 95% correct, and then have some "technical screw-ups" just to keep people from trying to learn from the books alone, before they had been taught the "correct" version. No wonder a lot of people got the wrong idea about his system!
In fact
Kamon Guy once stated the same thing in reference to the same instructor.
Kamon Guy noticed that this sifu would tell you
not to do something ever, and then you'd catch him doing something very similar! Well, I chalk it up to this whole contradictory way of teaching. As a educator by profession, and an unapologetic product of modern Western Civilization, I vastly prefer an honest approach. If my students ask me about a movement that they aren't ready for yet, I just tell them, "Yes, you have a good eye to notice that refinement, but you aren't ready to learn that yet." ...And finally I've found an instructor who is honest enough to teach me WT the same way.