'Produce X 101' has revealed more photos of the trainees who have succeeded with their hidden box missions!

The hidden box mission is a way for fans to see more of their favorite trainees. It involves trainees sticking their hands into a blind box in an attempt to guess what they're touching. Previous years have included slimy items such as eels and octopus, but also everyday items such as sponges.

Check out the trainees below that managed to guess within a minute, including Yoo Seong Jun (Yuehua) above.

Ham Won Jin (Starship)

Moon Hyun Bin (Starship)

Kim Si Hoon (Brand New Music)

Kim Guk Heon (Music Works)

Kim Joon Jae (ThinkAbout)

Choi Soo Hwan (Individual)

Kim Young Sang (MBK)