You'll be in charge of corvée labor, and you'll have plenty of plain porridge.

The protagonist, Ye Qiu, is deceived by his girlfriend, Han Qian. He spends all his savings producing ten tons of congee, only to find it unsellable. Driving his truck, he unexpectedly travels to the Great Yan Dynasty. By chance, General Zhang Xue mistakes him for a county magistrate. Ye Qiu initially believes he can use his magistrate status to live a peaceful life as a local tyrant, but he hears that the city's corvée laborers are rebelling due to food shortages. Faced with the emaciated laborers, Ye Qiu is moved and provides them with ten tons of congee. He thinks the crisis is over, but then… the real magistrate arrives, and Ye Qiu, the imposter, finds himself in a life-or-death situation. Even more absurdly, General Zhang Xue is secretly a bandit, and the previous magistrate was killed by her…

Synopsis from DramaGo.