C74 Weapons Exchange in the Stone Age

"System, can you open the front door?" At this moment, Qin Guan was talking to his brain.

Wasn't this system used to exchange equipment from the cemetery? Right now, he had entered a real graveyard.

Qin Guan really had no interest in playing a secret room escape game and needed to find a secret key or something like that. He didn't think that way. Rather than looking here and there