A modern railway engineer traveled back to the late Ming Dynasty. Starting from an iron pot and a piece of iron wire, he spent ten years laying rails on the land of Gyeonggi and building a steam ironclad. Finally, he used an armored train to force Huang Taiji to surrender at Marco Polo Bridge - only to find that the biggest enemy was not the Houjin Iron Cavalry, but the years of famine, land annexation, and the imperial court that could not even spare a tael of silver.
