Sifu Lam makes it clear that at this point in the training it is important that the student learn to sink his or her chi. That is to say that one should sink one's center of energy so that striking derives its power from the ground and not the shoulders. As Sifu Lam points out this simple exercise contains the five most important elements that make up fighting (among other things). These five elements are: speed, distance, timing, changing and power or, according to the Five Element Theory, fire, earth, wood, water and metal, respectively.