Busy Unifying, Not A Fallen Prince

Transmigrator Li Yan becomes the 'sucker prince' of Xia, obsessed with Wei Princess Wei Yun and selling the country for glory. After awakening, Li Yan slaps Wei Yun's face, allies with Princess Ji Qingyan of Jin, and recruits the disgraced general Han Shizhong to control military power. Facing a foolish father, evil queen, and Wei's conspiracy, Li Yan launches a coup to seize power and becomes emperor. He develops the economy, reorganizes the army, purges traitorous officials domestically, and uses strategy to trigger civil war in Wei. In the final battle in the capital, he lures the enemy with an empty city tactic, coordinates an inside-outside strike to annihilate thirty thousand Wei troops, launches a counteroffensive to destroy Wei, inherits the Jin kingdom, unifies the world, creates a prosperous era, marries Qingyan as his queen, and tames Wei Yun.