Bankruptcy at the start! Li Yan, who traveled through time and became a Marquis of Bianzhou, faced three dead ends when he woke up: state soldiers begging for food, bandits besieging the city, and powerful people claiming land. Even the system popped up a fatal warning of "three days of massacre." But who would have thought that this seemingly dandy Marquis was actually a hard-core scholar with a knowledge base of thousands of years of history. He smelted iron, mined mines, built canals and farmed fields, and he used his professional skills to revive desperate situations; he used his strategies to resolve crises in a battle of wits and diplomacy; he trained troops to go out to conquer the world and fight for hegemony, and he held up the sky with his iron fist. Three chapters are a little fun, and ten chapters are a big joy. From the Jedi in the borderlands to the Central Plains, from fighting alone to the coming of all nations, every step of the counterattack is hearty, and every time you climb to the top, your blood boils - this is a thrilling legend from the deserted prince to the eternal emperor!