T'ai-chi considers the eight fundamental arm positions to be like the eight trigrams of the I Ching, the five fundamental foot movements to be like the "five elements."
雙方對峙時，在沉靜中觀察，找出對方的要害，及制勝的先機，爾後「一舉克敵」。所以「十三式行功心解」上說：「彼不動，己不動。