Song Dynasty Develops Early Paper Currency Systems

1081

In Sichuan province, where heavy iron coins made commerce physically exhausting, merchants and provincial officials refined the jiaozi - government-issued paper certificates backed by coin reserves. These were not mere promissory notes but true currency: printed in standard denominations, enforced by law, and accepted for tax payments. Song China was inventing fiat money, a financial technology so abstract that Europe would need another six centuries to discover it independently.