Acording to this article Yip Man taught Lee Shing his Wing Chun as everybody knows in the 1950 s or 1960 s so would Lee Shing have shown Yip Man some of his Ko Lo Pien San Wing Chun even if Yip Man didnt use or learn any of it wouldnt Yip have been exposed to Ko lo Pien San Wing Chun ?
http://www.wingchunpedia.org/pmwiki/...n=WCP.LeeShing