In Hongqi Machine Tool Factory in 1975, the 600-ton hydraulic press in the forging workshop was making a dull roar. Li Jianguo, a national model worker, appears in the workshop on time at 5:30 every morning, using his rough hands to wake up this factory-building veteran machine. When the plowshare mold urgently needed by the agricultural machinery factory encounters a hydraulic pump failure, when the agricultural tools exported to support Africa face the forging problem of new steel types, and when the warehouse pipes suddenly freeze and burst late at night in the cold winter, this forger with only a primary school education is always the first to step forward.