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Celebrating the 20 years of Mystic TV Surprise, Mystic TV Surprise: the Secret Room invites viewers to the room of more surprising and intriguing stories. Celebrities who enjoy mysteries and conspiracy theories introduce untold stories that can definitely grab your attention.

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, Ella, 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 entertainments and SNH48 Group. Only nine from the 109 trainees will be selected through viewers' votes and debut as a group.