C23 Exquisite Undersea World

"Is this an underwater tomb?"

Qin Yu opened his mouth in disbelief. Ning Zhiyuan nodded and pressed a button in the middle of the door. The door actually opened.

"Let's go in first." Obviously, Ning Zhiyuan didn't plan to say anything more to the two of them.

After they had all entered, the heavy door directly closed as if it had sensed them