By day, Xing Long works in an office for a state-owned company in Changchun, an industrial city in the northeastern rust belt ...

the air reverberates with pounding techno beats. Young Chinese holding booze and cigarettes shake and sway in a red-lit passageway, below a big screen rolling through quotations from Chairman Mao.

Welcome to China's underground raves, from street techno to quotes from Chairman Mao Crouch through the small metal door and walk down the dark tunnel, and even before you step into the abandoned ...