In 2007, the K3 League had a demonstration season with ten teams. This season operated a two-stage system, with each side playing each other once in each stage for a combined total of eighteen matches (nine in each stage). The winners of both stages, Hwasung Shinwoo Electronics and Seoul United; and the best two clubs among the others in overall standings, Cheonan FC and Yongin FC, entered the championship playoffs. The four playoff teams earned a spot in the 2008 Korean FA Cup. Seoul United emerged victorious in the final of the championship playoffs, defeating Hwasung Shinwoo Electronics 3–0 on aggregate.