What the protagonist Gu Beichen was implanted was not a combat system, but a future technology library, which stored global non-nuclear military technology blueprints from the 1930s to the 1990s. He cannot conjure weapons out of thin air, but he can rely on the industrial design and management knowledge of future people to reduce dimensionality. During the war years, he combined patriotic businessmen and underground arsenals to manufacture and equip equipment that was a generation ahead of the Japanese army at an eye-popping speed. From imitation Mausers to mass-produced semi-automatic rifles to ground assault guns, he was crushed by plug-in level technology and forcibly tore a hole in the frontal battlefield.
