i've heard that Chi Sim Weng Chun is the original system deriving directly from red boat from wich derived others system of WingTsun...is said tha GranMaster Yip Man studied it but only a little bit bacause it was praticed in Hong Kong by sifu Chu Ching Man and sifu Wai Yan .....
it is said that Yip Man only knew the 30% of the system (weng chun).....he didn't learn nothing from Leung Bik ....
I would like to know something moro about it.....i've read rene ritchie's book in which he talk about this system......