Xiao Lanyun, a modern mechanical engineer, accidentally passed his soul into the body of a bullied young carpenter in Dadu in the Yuan Dynasty. This is an era of strict class and slave labor. Fortunately, he has awakened the "God-level Craftsman System", and any tools and equipment can be analyzed, optimized, and upgraded in his eyes. Starting from firing a furnace of top-quality steel and charcoal that subverted the era, he improved the bellows, revolutionized iron smelting, and made firearms... With knowledge and technology that far exceeded the times, Xiao Lanyun rose step by step from the lowest level craftsman to the great Yuan governor who influenced the world in this magnificent and chaotic world.
