In the summer of 2003, Chen Zhiyuan, a young man from Hubei Province, boarded a southbound green train with 300 yuan in his pocket and entered a hardware and electronics factory in Qingxi Town, Dongguan. Others work for food and clothing, but Chen Zhiyuan works to buy his boss's company! From a low-level QC holding a caliper to a manager in charge of a billion-dollar empire, every defective product he handles is a stepping stone to the top. Along the way, there are conspiracies on the production line and secret battles in the office, but the vernier caliper in his hand can measure the tolerances of parts and more accurately measure the depth of human nature!
This is a microcosm of the ups and downs of a generation of migrant workers: in the workshop with the roar of machine tools, pure love collides with cruel reality, and brotherly loyalty is intertwined with betrayal in the workplace. When the gears of fate roll over, can the young man who once believed that "hard work will lead to success" regain the self he was when he set out?
