Zheng Dunhan opened his eyes suddenly, and the mottled mold spots on the ceiling made his pupils shrink. The damp, musty smell penetrated his nose—a smell he would never forget. 2022, Shenzhen, rental houses in urban villages. He sat up like an electric shock and grabbed the Huawei phone with paint peeling off from his pillow. Screen lights up: June 15, 7:03 AM.