Great Tang: The Truth Is Out, I'm Er Feng's Illegitimate Son

The protagonist transmigrates to the Zhenguan era of the Tang Dynasty and opens a modern farmhouse restaurant outside Chang'an.

A powerful noble who calls himself “Old Li” often drops by for free meals. The protagonist boasts to him about the “favor-enfeoffment decree,” “the land tax reform,” and “the shape of the world.”

As a severe drought strikes Guanzhong and the Turks invade, the protagonist’s potatoes, the curved-beam plow, and steelmaking techniques all prove their worth. At last, Old Li reveals his identity: “I am Li Shimin, your emperor. Son, come back and take the throne.”