Cai Xu Kun was the center in "Idol Producer," making his debut in the group, 9 Percent. In this upcoming season, Cai Xu Kun replaces Lay as the PD. The mentors for this season are: Lisa (from girl group Blackpink) , Ella (from girl group S.H.E), and Jony J. There will also be "X Mentors" which are unknown guests. Since season 1 was only male trainees, season 2 will be only female trainees. Trainees are from different entertainment groups and SNH48 group. Only nine from the 109 trainees will be selected through viewers' votes and debut as a group. At the end of the show, the top nine contestants debuted as THE NINE, also known as THE9. 

A survival show featuring 100 contestants where 9 people end up debuting in a group called UNINE. It is the second season of Idol Producer. The contestants go through a series of challenges that will then be judged by the audience, and then by the designated panel of celebrity judges. As they go through many hardships to make it to the final 9 spots, who will make it to the end and debut as a member of UNINE?

Chinese reality boy group survival show. Brings together 100 different trainees, and only nine will be chosen. The final nine contestants debuted in the group, Nine Percent, also known as 9%.