Great Tang: I Fell into Princess Changle’s Bedroom from the Start, and Li Er?

Lu Jing, a double PhD in history, unexpectedly transmigrates to the Tang dynasty. From the start, he lands with pinpoint accuracy beside Princess Changle Li Lizhi's bath.

With the guards about to beat him to death as an assassin, Lu Jing can only rely on his encyclopedic knowledge of modern history to bluff his way out. Somehow, he convinces Princess Changle that he's an immortal, and she hides him in her boudoir.

To earn his keep in the boudoir, Lu Jing starts telling the princess about The Tang Dynasty: Five Hundred Years, The Capital, and How to Break the Aristocratic Clans' Monopoly.

Who knew the Tang dynasty would take such a strange turn? The gentle Princess Changle suddenly wants to discuss bourgeois revolution with Zhangsun Chong on the eve of her wedding.

Even worse, every day a furtive middle-aged man crouches outside the corner, frantically writing down Lu Jing's offhand nonsense in a little notebook.

Then one day, with the Turks at the Wei River, the middle-aged man who'd been eavesdropping kicks down the boudoir door and drops to his knees before Lu Jing.

The man cries out, “I am Li Shimin! The Tang dynasty is in peril. I beg you, sir, come out of seclusion and save the emperor!”