First of all, so-named
Gung Ji Chaak is Lam Saiwing's compilation, bringing practical drills and additional skills together into a two-man presentation. Actually, it should be called "Lam Saiwing
Chaak", or "Hung Kyun
Chaak", because it encompasses both foundational and specialty techniques found within the GJFFK, FHSYK,
Sap Ying Kyun, all main pillars. Also, some not found in those sets at all.
So-named
Fu Hok Chaak is actually a revision of
Gung Ji Chaak, because the guys wanted something fresh and new to demo. This was established by an individual, or individuals, who already knew how to fight, but wanted something more dynamic and less repetitious to demo. The idea was, that by the time you mastered the
Gung Ji Chaak, your skills would all be up-to-par, and the newly-established demo form was available to learn. It was never, until quite recently, used or intended as any kind of "replacement" for Lam Sawing's original choreography.
Now, the rumor somehow started, that "the
Gung Ji Chaak teaches you
Gung Ji applications, and the
Fu Hok Chaak teaches you
Fu Hok applications", when actually this is not the case. Really, it's just a simple matter of, "you learn the GJFFK first, and then the FHSYK, you learn
Gung Ji Chaak first, and then you learn the
Fu Hok Chaak", coupled along with, "we need some names to call these different two-man sets by, when they are to be announced onstage", no more, no less.
Yes, some schools just focus on demo-ing, because demo-ing is fun. Then the emphasis becomes, "you can be on your tiptoes for the whole set, so long as your heel is down on your cat stance, both beginning and at the end". I can't speak to this. It all depends on the values of that school. Also, the individual(s) who are actually involved.
Bottom line, even the best "
Chaak presentations" have never been a substitute for "Technique Breakdowns" and "Reaction Drills" (
Saan Sik/ Bin Fa), generally, and based on projected situations as well. Still, when I hear the way people talk about their basics sometimes, it doesn't sound as though they are getting quite what they should be,
which, in my mind, should be the real concern.

Best,
Michael