ee jee seung do (er zi shuang dao, parallel shape double knives) train the use of twin short weapons. Their name is derived from the fact that they alternate in a yin & yang manner, never crossing near a practitioner’s own arm (a dangerous practice in application). In wing chun, the hands work like knives and the knives like hands. When applied, the wing chun knives intercept or bar and cut the first available target, then move quickly to finish an opponent. This finality of usage has also led them to be called by the more brutal name of dit ming do (life-taking knives), or the longer yee jee kim yeung dit ming do ("yee" character yang clamping life-taking knives).

Wing chun knives are distinguished by their simplicity. They are never twirled, nor spun about and are always held with the blades extended out towards the opponent rather then folded backwards across the forearm. With the fundamental drill of cultivating knives, a practitioner learns to wield, control, and change the two knives economically and efficiently while stationary and while moving in all directions. Subsequent motions introduce slicing, stabbing, barring, dispersing, cross shape, wing, protecting, stealing & leaking, and other simple, elegant, yet frighteningly effective techniques.