Transmigration: I Woke Up as the Ruler of a Fallen Kingdom

I arrive in the Southern Song and become its de facto last ruler: Emperor Song Duzong. Naturally, I have only one path: lead the Southern Song back to the pinnacle of the world. Abroad, I fight the most powerful Mongol cavalry in history. In the martial world, danger lurks everywhere. At court, I match wits with Jia Sidao, one of the Southern Song's four great treacherous ministers. And when it comes to romance, things are bafflingly complicated.