Traveling through the Southern Song Dynasty, Zhao Heng became a marginalized member of the royal family. There was peace and harmony in the court, but he discovered that the sword of the Kingdom of Jin had long been replaced by an abacus. The proliferation of bad money, food price control, spice monopoly... A war of subjugation without any smoke has quietly begun. Let's see how he used financial planning as his sword and data as his armor. Between the account books and the charts, he fought for a future for the dying Song Dynasty to come back to life.