I'm not super familiar with this show, but I believe they do interviews and see who might be a good fit for the…
Ah, I meant all the false information previously submitted to this page. But thank you for the info, I'm sure they're also looking at possible affinities between the members and what would sell the show.
Small correction to name (dunno how to edit), it's Gu Jin Zhao, may also hear people address her as Zhao jie'r. Polyphone 朝 as chao means court, zhao means morning/day.