Short story by Hao Jingfang.

"He ventured cautiously through this strange twilight city. The sky was gray, the city gray. There was a peculiar feel to this city, the air swollen with an impending danger. The skyline was punctuated by a relentless succession of high-rises—the buildings’ rebar skeletons were gray, their glass flanks tinted gray. The gaps between the buildings were inked an impenetrable charcoal-gray. The sky was choked by a dense layer of low-hanging clouds, the skyscrapers’ invisible crowns swallowed by the ashen haze..."