C432 Airborne Transmission

"Yes." I nodded. "However, no matter how big this place is, it can't be bigger than the underground buildings on our island or the buildings in the Black Gold Mountain."

"That's true." Ouyang Jingjing said.

At this moment, the thumping sound started to follow our footsteps again. The number of people seemed to be increasing.

By this time we had gone around in a wide circle in this space