Choong-Moo was the name given to the great Admiral Yi Soon-Sin of the Yi Dynasty. He was reputed to have invented the first armored battleship (Kobukson, Nicknamed the "Turtle Ship") in the year 1592, which is said to be the precursor of the present-day submarine.The reason why this pattern ends with a left hand attack is to symbolize his regrettable death, having no chance to show his unrestrained potentiality checked by the forced reservation of his loyalty to the king.Checked by the forced resevervation of his loyalty to the king, Yi Soon Sin was given no chance in his lifetime to show his unrestrained potentiality. This ITF pattern has 30 movements and its diagram is a capital I.