On December 28, a rep from Cube revealed, "We have recently signed a contract with Jeon So Yeon. However, the details on her debut have yet to be confirmed."
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Previously, Jeon So Yeon was a trainee under Cube Entertainment and made appearances on survival programs such as 'Produce 101' and 'Unpretty Rapstar 3'. She'll now be making an official debut as a Cube artist in the near future.
Good luck to Jeon So Yeon!