Initially well-known for his membership in the South Korean boy band SS501, Kyu-Jong afterwards pursued a solo career, releasing his first independent recording, Turn Me In, in later 2011. Also an professional, he starred in the Mnet sitcom Break and performed the function of Nicky on it Chosun series Keeping Madame Move Bong Shil. Prior to making his debut with SS501 in 2005, he went to the Baekje Arts University. From 2012 until 2014, compulsory army provider interrupted his entertainment profession. He and his sister Eun Ah had been born and elevated in Jeonju, South Korea. He and Heo Young-Saeng both increased to popularity as associates of SS501.