Posting of incorrect info.
SiJiHao,
What you have posted is incorrect. My Sigung's book states that Tang Fung learned originally under Lam Sai Wing and later went to study under Wong Fei Hung. Not only does it states that he learned the Osteopathy, he also learned Hung's Pugilism from him.
It's unfortunate that someone who does not represent Tang Fung lineage believes that he knows much about it. This is like saying I know all about you lineage yet I haven't a clue to which branch you belong.
It is a fact that Tang Fung learned some gung fu from Lam Sai Wing, it is also a fact that he was with Lam Sai Wing during his the Luk Sin incident. However, you are sadly mistaking to believe that Tang Fung only learned medicine under Wong Fei Hung.
It was Wong who taught Tang Fong the advance methods of Hung Ga not Lam Sai Wing.
Not only does my sigung mention this in his book Lau Sing Kuen, he also mention it in his book on Lung Fu San (Hung Ga Pugilism) as well as his first book on Hung Ga San Sau.
Each of these books stated he learned Hung pugilism under Lam Sai Wing and later from Wong Fei Hung. I couldn't see the close relationship between Mok Gwai Lan and Tang Fong if he was not a sup yut dai Gee under Wong Fei Hung.
HuangKaiVun,
Regarding whether or not Lau Sing Kuen is not a Hung Ga set. This is like saying Butterfly Palms, Lau Ga Kuen, Arrow Fist and other forms are not hung ga. This is far from the truth, we know that each branch has their on flavor and with this its on representation of what Hung ga is. All the techniques in Lau Sing Kuen come directly from techniques found in other Hung Ga forms. It's hard to know or understand this if you don't actually learn the form from someone who is qualified to teach it.
Peace
Je Lei Sifu.
The Southern Fist Subdues The Fierce Mountain Tiger