South Korean left backer who has made a name for himself as a member of the Jeonnam Dragons in K League Classic and the Queens Park Rangers in Premiere League. He was a member of the South Korean squad at the 2014 FIFA World Cup.
He played in the youth system of Jeonnam Dragons beginning in 2006 and made his senior debut for the club in 2009.
He was named Man of the Match for his March 2014 performance in a match against Middlebrough in which he played the full 90 minutes.
He was born in Suwon, the capital of the South Korean province of Gyeonggi-do.
He was teammates with Koo Ja-cheol during the 2014 FIFA World Cup.