Reborn in Dafeng: I Rose to the Top by Marrying a Princess

Shen Wannian accidentally transmigrates back to the Great Feng Dynasty. Using modern knowledge, he invents soap and hopes to make a living from the soap trade, becoming a wealthy man free to do as he pleases. But he unexpectedly gets caught up in a royal power struggle. He plans to leave, change his name, and spend the rest of his life in obscurity, only to meet a princess and find love. With no other choice, he helps the crown prince seize the throne, marries the princess, and reaches the pinnacle of life!