Late at night, Lin Mo came to work for the first time. The security room was extremely tidy, with only a thick "Work Guide", an old-fashioned flashlight, a walkie-talkie, a bunch of keys and a map photo on the wall. He casually opened the "Work Guide" and frowned at the detailed and unbelievable rules inside. "Prank? Or some kind of mental test?" He recalled what the HR manager with a standard smile said during the interview: "Mr. Lin, this job only requires you to 'strictly abide by the rules'. It's very simple."