2147, The thirtieth year since the "Rust Storm" swept across the earth.
Lin Ye knelt under the steel frame of the abandoned subway tunnel, and the multi-function wrench on his fingertips made a crisp metallic sound at the joint of the left leg of the "Hummingbird" mecha. The orange-red emergency lights cast swaying spots of light on the tunnel wall, illuminating his oil-stained face - a shallow scar on his cheekbone extending from his brow bone to his chin, which was a souvenir from the "scavengers" fight three years ago.
