Gong Chan-sik, better known by his stage name Gongchan, is a South Korean idol and the youngest of boy band B1A4. He made his singing debut on the stage of the MBC Show! Music Core on April 23, 2011, and made his acting debut in the web drama "Delicious Love" in 2015.

Gongchan was discovered on Cyworld as a result of his winning of an "Eoljjang Challenge" when he was in middle school. He was also a runner-up of a cross-dressing contest, where he danced to a song by soloist Ivy. He then underwent a training period of two years.