Christian Yu known professionally as DPR Ian is an Australian singer, songwriter, dancer, producer and director based in Los Angeles.

He is a former member of Yedang Entertainment boy group C-Clown, which was active between 2012 and 2015. Yu made his solo debut under his co-founded label Dream Perfect Regime (DPR) with the digital single "So Beautiful" on 26 October 2020. His first studio album Moodswings in to Order was released on 29 July 2022. He was the 10th most streamed K-pop Male Solo Artist Globally on Spotify in 2022.

DPR Ian was born in Sydney, Australia on 6 September 1990. His parents separated when he was young, and he was raised by his mother. He attended Wollongong High School of the Performing Arts and played in a heavy metal band, where he was influenced by the musicals and circuses he attended as a child. In 2008, when he was 18, he started uploading videos to his YouTube channel, going by the name of B Boy B.yu. After graduating from high school, Yu studied science and art at the University of Sydney for one year before dropping out. He then moved to South Korea to pursue dancing, initially having no intention of becoming a K-pop idol. However, this changed when he was street cast by an entertainment agency; when he auditioned, he couldn't sing but he was able to impress with his dancing abilities.

Yu debuted as the leader of K-pop group C-Clown under the stage name Rome, which was derived from his Korean name "Ba-rom". The 6-member boy group debuted in 2012 and was the first idol group created by entertainment agency Banana Culture Entertainment, formerly known as Yedang Entertainment. After C-Clown disbanded in October 2015, Yu along with Live, Cream, and REM established the label Dream Perfect Regime, all of whom attach the label's acronym—DPR—to their names. In 2021, he released his debut extended play Moodswings in This Order. He released his first studio album Moodswings In To Order in 2022.