Cause & Context
In early Song Sichuan, heavy iron cash impeded commercial expansion; local merchants created private paper vouchers ('Jiaozi'), but merchant insolvencies led to financial instability.
Epochal Overview
In 1023 CE under Emperor Renzong, the government established the official Jiaozi Bureau in Chengdu, issuing reserve-backed, counter-forfeiture printed paper money as legal tender.
Key Figures
Chengdu officials Xue Tian and Kou Jian advocated state management, institutionalizing credit practices pioneered by 16 prominent merchant houses.
Civilizational Impact
Jiaozi pioneered the transition from commodity money to fiat paper currency in human economic history, energizing Song commerce 600 years ahead of European central banks.