When \u548f\u6625<\/strong> departs from the centreline, techniques emerge that help deal with bigger, stronger opponents. There are defensive movements that \u2018roll off\u2019 and redirect force and there are offensive movements that multiply power through rotation. Both use the pivot action. Ip Man famously put years of effort into the pivot action found in Chum Kil<\/em> \u5c0b\u6a4b. As a small person of around 5\u20194\u201d (162cm) tall, it would have enabled him to gain the most potential from offensive and defensive moves.<\/p>\n Wing Chun\u2019s<\/strong> first form, Sil Lum Tao<\/em><\/a> \u5c0f\u5ff5\u982d, establishes and reinforces the importance of straight lines and following the centreline. When practitioners advance to the second form, Chum Kil<\/em><\/a> \u5c0b\u6a4b, the coordination of rotational power gets introduced. This can be used to add an extra dimension to straight-line punching. Compare the jab and hook techniques in boxing. The jab is used at longer ranges, keeping opponents at bay, wearing them down and scoring points. The hook punch is often used as the knockout blow, with all the torque from the body going into it.<\/p>\n Sister style to \u548f\u6625<\/strong>, \u9f99\u5f62<\/strong>, takes rotation even further. The style emphasises launching forward with strong low stances that combine a subtle hip rotation driving the often circular hand work. This appears in the basic Na Ma<\/em> \u2018pressing horse\u2019 training and is further emphasised in the first two forms, but especially in the second form, Sam Tung<\/em><\/a> \u4e09\u901a. In addition, Lung Ying\u2019s<\/strong> features some circular strikes that build on the hip action. These close-range attacks are powered by rotation and can also follow a side-stepping opponent. These are the Boi Gim<\/em> forearm (which travels from inside out) and the Cao Pat<\/em> hammer fist (which travels from the outside in).<\/p>\nWatch the video<\/h4>\n