The sound was as heavy as thunder, pressing down from the top of the floating city, penetrating through the sea of clouds and steel supports, and finally turning into the never-ending background noise of the Rust Belt area.
Xu Xu huddled in the narrow and stuffy maintenance cabin, already numb to the sound.
In his world, there was only the sharp sound of the old ventilator in his hand.
Sweat slid down his thin cheeks, dripping on the oily metal shell, and a trace of white steam evaporated.
He held his breath, twisted a shiny tuning wrench between his fingertips, and concentrated on exploring the inside of the machine.
