I Work in the Prison Industry at 4:00

Technical expert Zhao Tianci received the most difficult project in his career: entering the strictly managed Provincial No. 6 Prison and using a set of modern processes called "single-piece flow" to innovate the clothing production line that he had followed for decades. What he faced was the instinctive resistance of prisoners, the covert obstruction of existing interests, and the self-contained set of survival rules within the high wall. Technical drawings can plan processes, but they can't understand people's hearts; performance appraisals can stimulate efficiency, but they can't fill the gap of desire. Reform is advancing with difficulty amid pain. However, when the first production line was finally running smoothly, during a routine lining process, Zhao Tianci found a note between the lining and the fabric that should not have appeared. The note came from a prisoner whose identity is a mystery, codenamed "Lao Yang." The above information points to a past event that was carefully covered up by the system. From then on, every piece of production data submitted by Zhao Tianci was regarded as performance in the eyes of some people, but in the eyes of others, it became... A fatal variable that could disturb the entire chess game.