C37 Is earth

Inside Yichang City, Mu Tu and Xiong Zifeng were respectfully reporting to their director, Dongfang Hong, about the results of the mission.

Seeing that there was already an extra gold ring on the Twilight Knife in Mu Tu's hands, the director didn't seem to have any more questions.

"We randomly sorted out one of the clues according to the combination of the four clues. One of them was a cave