Chon ji is a Taekwondo 19-movements form (hyeong). Literally, Cheon-Ji (or Chon-Ji) means “heaven and earth” and refers to the creation of the world or the beginning of human history, and thus is the initial pattern learned by the beginner. It consists of forearm low blocks and punches in the first part to represent earth, and inner forearm middle blocks and punches in the second part to denote heaven. It does not use any kicks. The cross shaped diagram represents the four elements of the universe: fire, water, air and earth.
[From Wikipedia. Original page is here]