As the night falls, neon lights dim the shadows on the damp streets, outlining the city's luxuriant appearance. Lin Yu dragged his tired body out of the factory assembly line. His worn canvas shoes stepped through a puddle of water, splashing water and wetting his trousers, but he didn't notice it. With meager salary and long working hours, life is like an airtight net that tightly binds this twenty-year-old young man.