Choi Jong-hyun (born November 16, 1995), better known by his stage name Changjo, is a South Korean singer and actor. He is best known as a member of the South Korean boy group Teen Top.
Changjo was born Choi Jong-hyun on November 16, 1995 in Chuncheon, Gangwon-do.
On July 10, 2010, Changjo made his debut as a member of Teen Top with their debut album Come into the World on MBC’s Show! Music Core with the title track of the album “Clap”. As of their debut, Teen Top has released one studio album, seven EPs and four single albums.