From the Start, I Was Exiled to the Northern Frontier, So I Made Steel and Built Cannons

A modern soul transmigrates into Liang Zhao, the least favored prince, and is exiled to Liangzhou, a barren fief at the northernmost edge of the dynasty. This land of famine, drought, and encroaching enemies is regarded by everyone as a graveyard. But to Liang Zhao, armed with a thousand years of knowledge, this wasteland is full of treasure.

He makes gunpowder from nitrate-rich soil in the alkaline fields, smelts ignored black stone into fine steel, and fires bricks into cement to strengthen the city walls. Against the fierce cavalry of the Shaman tribes, he first launches a surprise attack with land mines, then routs the enemy with "Heaven-Shaking Thunder" grenades, and finally unleashes his handmade "Dragon's Roar Cannon." From five li away, one shot snaps the enemy's royal banner and utterly routs their army, creating an impossible military miracle.

But a secret letter from the capital reveals that this deadly battle was merely a trap set by his ambitious elder brother. The Yue family, the tigers of the northern frontier, have also quietly entered the game as the "oriole." Liangzhou's struggle for survival has only just ended, and a storm of political intrigue engulfing the entire dynasty is only beginning.