(Horizontal chest line) The point where the is divided from the lower trunk of the body, so that the various deflections of Wing Chun may be seen to work in their relative spheres.

(Slipping attack) Slipping is used primarily against an opponent who creates an opening by means of changes in direction of intent or weight. When such takes place, the hand is free to strike, and does so automatically by the use of spring. In the Scott Baker system, slipping is consider one of the techniques from Siu-Nim-Tou.

(Sing Springtime) Also known as "Hum or Chant Springtime."

(Guarding hand) Found in the third or Saam-Kei-Fat section of Siu-Nim-Tou. When a hand is inactive, this position is held, to defend the center line (zung sin) and the horizontal chest line (waang hung sin), referred at times to as the "mother line."