Wing chun training – strengths and weaknesses Posted on July 22, 2016August 27, 2016 by Sifu David Wing chun training – strengths and weaknesses “Master yourself & nothing will be impossible” -Sifu David P.S. Grab your FREE Wing Chun DVD yet? Limited Copies Available.. Get Your FREE DVD Here! P.S.S Reserve your introductory live class yet? Qualify for your free class voucher.