To clarify, it has been said that Wong Feihung brought
Tit Sin Kyun/ "Iron Wire" into the curriculum of his father, Wong Keiying, who originally taught the
Hung Ga Saam Jin Kyun/ "Hung Family's Three Extensions Boxing", as his personal training system for
noi gung/ "internal skill".
Entirely compatible with Lam Fooksing's "Iron Wire", the "Three Extensions Boxing" was absorbed into this set, and, but for a few distinct and signature techniques, the methods which were shared in common became as one.
Indeed, the
hoy jung/ "opening section" of the GJFFK, SYK, and TSK sets as we practice them today, actually represents a synthesis of both the "Three Extensions" and "Iron Wire" methods, combined.
From this, we may infer that the foundation of our
Hung Ga method is
noi gung.
Now, to say,
Gong Yu Tit, Yau Yu Sin/ "hard as Iron, soft as thread", is to say that one should balance "being firm, without straining, and being supple, without laxness" in one's own daily practice of
noi gung.
Therefore,
Tit Sin/ "Iron Thread" can be understood as being, much more than just a set, but rather a standard to which all
Hung Ga practitioners should aspire.