The rain in Nancheng fell like a string of beads torn apart, pounding against the asphalt and sending up splashes half a foot high. Lin Feng parked the police car outside the iron gate of an abandoned factory on the outskirts. The wipers swept frantically back and forth, but still couldn’t clear the rain from the windshield. He pushed open the car door, and a cold, fishy stench of rust and mud rushed toward him, making him shiver.