The Korean international signed for Reading in July 2006 from Wolverhampton Wanderers where he played 76 games for the Black Country team from August 2004.
Ki-Hyeon started his career at Antwerp in Belgium staying for one season prior to joining fellow Belgian team Anderlecht, where he stayed for three years experiencing Champions League football during this time.
During the 2002 World Cup Finals held in Korea, Ki-Hyeon became a national hero by playing all six games for his country as they reached the semi-finals of the competition. He also appeared in the 2006 World Cup in Germany again appearing for his Country as a substitute during the group stages.