Song Hyeong Jun (송형준) is a South Korean Singer under Starship Entertainment. He participated in the hit survival show Produce X 101 where he ranked 4th on the final episode, earning him a spot to debut as a member of the boy group X1.
X1 officially debuted on August 27, 2019 with the mini album, 비상 : Quantum Leap.
However, on January 6, 2020, the agencies representing the members announced the group has disbanded due to not being able to reach an unanimous agreement following the Produce 101 vote manipulation controversy.
Hyeongjun debuted as a member of CRAVITY on April 14, 2020 with the release of the mini album Hideout: Remember Who We Are - Season1.