[2] Unine was formed through the reality survival television show Youth With You, which aired from January 21 to April 6, 2019.
[3] Prior to Unine, Li Wenhan debuted in the Chinese-South Korean boy band Uniq in 2014.
The group performed title song "Set It Off" at the 2019 Mnet Asian Music Awards' Red Carpet Special Stage.
[5] Unine released their album U-Night Flight of 11 songs on May 6, 2020, and, before their disbandment, the EP UNFORGETTABLE on September 30, 2020.
On 6 April, after their debut, PD Lay Zhang and guest host He Jiong announced the group's logo and that Unine would be the ambassador of 蒙牛真果粒.