The Great Qin Military Ancestor: I Have a Ballistic Trajectory Prediction System

Xu Rui, a PhD in physics, transmigrated to the first year of King Zheng of Qin's reign, awakening in the body of a crossbowman who had just died beneath Yiyang City. No golden finger to protect him, no invincibility from the start. In the very first second after he woke, a boulder smashed down just three feet away, spattering half his face with blood. The System gave him six stats: Strength 7, Speed 6, Reflexes 8, Stamina 5, Combat 4, Archery 9. His only way to survive was to shoot arrows. The academic foundation he had built through three months of trajectory modeling became the skill to kill with a single arrow through the eye from forty paces away. Each time he drew the crossbow, another bloody gash opened in his palm. Each person he killed raised his combat rating by ten points. From warrior to squad leader, from squad leader to company commander, from company commander to deputy general. Meng Ao noticed him. Wang Jian took note of him. His name appeared on King Zheng of Qin's desk. He used fluid mechanics to calculate trajectories, statistics to optimize formations, and engineering principles to improve crossbows. Every battle was a math problem, every upgrade a new System iteration. But the Warring States era was about more than battlefields. The blades in court were harder to dodge than the arrows atop the city walls. Lü Buwei's retainers were looking into him, Zhao Ji's people were watching him, and Lao Ai's faction was infiltrating the army. Seven states vied for supremacy, a hundred schools of thought contended: an age of iron and blood. A physics PhD, a crossbow, and a trajectory prediction system. From an unknown nobody beneath Yiyang City to the first man in Qin to earn a noble title through military merit.