Chen Yuan, a modern civil engineer, accidentally traveled through Daqin and became a prisoner "tattoo" on the Great Wall construction site. Cement? Rebar? Large machinery? Not at all. There is only loess, gravel, a sea of people, and the cold whip of the overseer. But he discovered that his knowledge of modern engineering had become the most dangerous "witchcraft" in the Qin Dynasty. When Meng Tian pointed to the drawing and asked "What is this?" Chen Yuan knew that he would either use his professional knowledge to create a miracle, or he would be filled in the foundation of the Great Wall because of "deception".
