The gray-red steel long wall stretches straight down, with the embedded light strips illuminating the massive corridor layer by layer, dozens of layers, nearly a hundred layers, thousands of layers, the long passage spirals endlessly with no end in sight.
Here, containers filled with all sorts of heavy materials are secured on steel tracks, propelled by electromagnetic drive, speeding forward, roaring back and forth ceaselessly, and above the tracks, cameras under the control of the central AI constantly monitor the entire corridor's operation.
