C121 Uncover the truth

Gu Shiyi was in the tunnel, and not long after, she reached the end. Right above her, there was a square exit, and it looked like it could only fit one person.

Gu Shiyi reached out her hand to press against it, only to realize that there seemed to be something blocking her up above. She took a deep breath, and used all her strength to push upwards.

After exerting her strength