In the first place, Wing Lam's book is offering the reader a basic overview, not to be construed as actual instruction. Second, the reason you are puzzling over what "
Hung Ga Five Elements" are about, is that, at beginning/ indeterminate level, students shouldn't be concerned about such things.
With qualified instruction and practice, everything becomes clear in it's own good time. If you are curious, it's a good and healthy sign, because it means that you'll have something to look forward to.
However, in order to answer your question, you will have to look at what point, or points the
Ng Hang (Five Element) concepts were introduced to the main syllabus of
Hung Ga Kyun, what their original derivation, and what their intended significance. As for the
Ng Ying Ng Hang Sap Ying Kyun (Five Animal, Five Element, Ten Forms Set), it is a (relatively) recent compilation.
For a much simpler explanation, I can sum it up for you in just one word: "syncretism".
Ok?
