Most notable as the team leader of the South Korean boy band Astro. He rose to fame after the group's first mini-album Spring Up landed at #6 on the Billboard World Chart and #4 on the Gaon Music Chart. He has also starred in the music group's web-series, To Be Continued.
He started out as a trainee of the Fantasia iTeen program along with the rest of the members of Astro. They were previously known as iTeen Boys.
He is called the "Slow Rapper" of the group because of how slow he talks. His role model is Big Bang.
His real name is Park Jinwoo, but he goes by his stage name JinJin. He graduated high school at Hanlim Multi Arts High School in 2015.
He is joined by Cha Eunwoo in the boy band known as Astro.