- Transmigrator: Lin Mo, a modern double PhD in mechanical engineering and materials science, and a key researcher at a military research institute. He specializes in precision manufacturing, building industrial systems, and applying basic sciences. Calm and practical, he has principles but isn't rigid. He transmigrates due to a laboratory accident.
- Era: The fictional ancient Great Yong Dynasty, a fractured period resembling the time between China's Five Dynasties and Ten Kingdoms and the Song Dynasty. In the north lies the nomadic empire of the Golden Wolf Khanate, while the south is divided among the three kingdoms of Yong, Chu, and Yue. Warfare is frequent, and technology is backward: ironware is poor quality, there are no assembly lines, and basic chemical engineering is nonexistent. However, there are special spirit ores that can slightly improve the properties of metals. These hint at a later fusion of technology and the supernatural.
- Main appeal: Using modern industrial thinking to overwhelm ancient productivity, starting with making iron nails and smelting steel, then gradually establishing a military-industrial system, chemical plants, and assembly-line factories; building a modern army; ultimately unifying the divided continent and resisting foreign powers, even laying the groundwork for a Steam Age.
