Shen Xian, a top student in the Department of Finance, died suddenly after staying up late. As soon as she opened her eyes, she was transformed into an unloved concubine of the Northern Song Dynasty. She was sold out for happiness at the beginning. She backhandedly dragged the regent Zhao Heng into a loan shark trap, used modern knowledge to revitalize Cha Yin, pioneered Jiaozi, issued war bonds, and even IPOed the entire Song Dynasty, turning ordinary people into shareholders and the treasury to the limit. The abacus beads flew up, and she became the richest man in the capital, and also won the prince's heart. Zhao Heng resigned from the army, moved into his wife's bank, knelt down on his abacus, and wrote down thirty-six strategies for doting on his wife. He was hired by Shanhe and promised compound interest throughout her life. From "repaying debts with flesh" to "ROI+∞", they repay each other's debts and spoil each other. Traveling through the eleventh year, Shen Xian handed over the central bank's money printing machine, traveled around the world with his prince, and created a small money printing machine. The sound of copper coins is far away, but the love never fades - this is a sweet feast that treats the country as a company, love as compound interest, and life as an Easter egg.