Master Heo In Hwan, technical director of the International Federation, delights us with a refined technique where it is possible to discern the softness and fluidity of their movements. We will look at the theories of the Circle, water, the union and the division of power, the 12 basic forms Chon Ki Bup in the way Chung Gui Bup of attacking and Chigui Bup from which it receives, and applications against various opponents.