Jin Longguo (용국; also simply as Longguo or Kim Yongguk) is a Chinese singer under Choon Entertainment. He is a former member of the project group JBJ and the unit duo Longguo & Shihyun.
He made his solo debut on June 13, 2018 with the single "Clover".
He was eliminated episode 10, rank 21 on Produce 101 Season 2. He is now an MC of SBS MTV The Show along with NCT’s Jeno and CLC’s Yeeun.