Kum Na in Cantonese or Chin Na in Mandarin is the art of trapping, joint locking or manipulating the joints. There are several degrees of Kum Na. These techniques invariably begin with bridging using the “kiu sau or forearm”, leading to trapping of the limbs. Techniques implemented can lead to either neutralising an opponent or in more extreme cases ending in dislocation or the tearing of tendons from the bone depending on the technique or force applied.
Kum Na is essentially understanding body mechanics, knowing how muscles and tendons move to manipulate them where they can no longer bend. Choy Lee Fut mainly focuses on upper torso locks. These can be divide into 3 gates.