Lin Yu, the night shift maintenance worker, was dragged into the back of the city rules by the "maintenance order". In the cracks of the "return/erase/replace" process, he rewritten "erase the excess" into "fix the error" with pen and paper. Finally, he signed the new contract with his two names and made it a regular one. He became a gatekeeper and continued to take orders at four o'clock in the morning.
