Spies of the Southern Song Dynasty: Crossbow Secret War

"If you hand over this blueprint, one hundred thousand people will live. If you destroy it, Qingshi will keep your name of loyalty." In the fourth year of Xianchun's reign, the drawings of the crossbow machine that changed the fate of the country were mysteriously stolen in Lin'an, leaving only an ancient coin from the previous dynasty at the scene. Chen Yan, a junior military officer, was ordered to investigate, but found that his respected Wang Nianjiao, the female craftsman who cherished each other, and even the general who guarded Xiangyang, all had different intentions. What's even more fatal is that he received a secret order: "The drawings can be lost, and the person who designed them must die." When the city of Xiangyang was about to be destroyed, his former best friend pointed his sword at him: "I am not a traitor, I just want to leave a spark of fire for Chinese civilization in this troubled world." Chen Yan holds on to the incomplete drawings and faces the final choice: to be a hero who will leave his name in history, or to be a guardian in the dark side of civilization?