When she reached the Lantern Quarter, the recipient was waiting: a child with tattooed hands and a laugh that made Lin’s teeth ache with hope. The child reached for the suitcase and touched the Baidu PC with reverence and then, without looking back, tossed Lin a paper crane made from receipt paper. On the crane’s wing was written a single cipher she recognized—one of the routes she’d once drawn on that unlucky suitcase in permanent marker.