Modern young man Fang Zhengyi traveled through Taoyuan, a remote and poor county in Dajing. He relied on modern knowledge to create asphalt roads, flush toilets, newspapers, gunpowder, sweet potatoes and other advanced objects, and managed the poor town to make the people prosperous. After making a secret visit, Emperor Jing was surprised by his talent and transferred him to the capital to serve as the crown prince. He used alternative methods to educate the rebellious prince, fought against the conservative civil servants who talked about benevolence and righteousness, and used gunpowder to blow up mountains to quell the floods in Jianjiang River. He and the prince tested each other and became close friends.
