5 ideas
The massive inflow of Japanese and American silver into Ming China is best explained by internal demand rather than foreign supply shocks. After paper money collapsed and bronze coinage proved inadequate, Chinese households, merchants, and the state turned to uncoined silver as the medium of exchange and store of value, and that demand pulled silver across oceans.
The early Ming state issued inconvertible paper notes (baochao) with no reserve backing and no mechanism to withdraw them. It printed them to meet fiscal needs while refusing to accept them fully in tax payments, so the notes rapidly lost value. By the mid-fifteenth century the public had effectively abandoned them in favor of silver and coin.
Chinese paper currency began as private deposit certificates and exchange bills among merchants in Sichuan, a region that used cumbersome iron coins. The Song state took over note issue in the 1020s, converting a commercial credit instrument into state-backed fiat currency that circulated alongside metal coin.
The value and form of money depend on what users actually accept and trust, not only on what rulers proclaim. Viewed this way, Chinese monetary history is a running negotiation between state fiscal interests and market behavior, in which the public repeatedly rejected state media it distrusted and adopted alternatives such as silver bullion, private coin, and foreign coins.
Chinese monetary policy can be analyzed as a tension between two logics. The fiscal logic uses currency issue to fund the state, especially in war. The market logic requires stable, trusted media for exchange. Paper money worked under the Song and early Yuan when issue was restrained and backed by convertibility or tax acceptance, and it failed when fiscal pressures led rulers to abandon those disciplines.