Jin Xiao squatted in front of a scrapped neural synchronizer, his fingertips scratched the dried oil stains on the shell, and his fingertips rubbed a piece of sticky glue. He didn't frown or make a sound. The screen of the synchronizer was broken long ago, but the internal circuitry was still connected. A weak current flashed occasionally at the fracture, like the last heartbeat of a dying firefly.