Wing Chun Butterfly Knife training coursebr Subscribe for more videos, click here: br Get the course now on Udemy: br For more info on our training please visit our website: br These video contains clips are from the Wing Chun Butterfly knives training course contains. A sneak preview on what the course has to offer. Master Wong has shows how the applications are adapted to attacks use on the streets in the 21st century. So the movements are never out dated.