In 1862, Taiwan Province, under the administrative control of the Qing Dynasty, operated within a complex and fragmented monetary system typical of the empire's coastal regions. The primary official currency was the silver
tael, a unit of weight rather than a coin, used for large transactions and tax payments. However, the actual circulating medium was dominated by a mix of foreign and unofficial coins. Spanish and Mexican silver dollars (known as "Carolus" or "Eagle" dollars) were particularly prevalent due to Taiwan's role in international trade, alongside various older Chinese silver sycees and copper
cash coins for everyday smaller purchases.
This period was marked by significant monetary instability. The value and exchange rates between silver and copper cash fluctuated wildly, exacerbated by the
Taiwanese monetary unit known as the
"tael of exchange" or
"fictional tael," which was an accounting unit used to denominate silver but had no standard physical form. Furthermore, the ongoing
Taiping Rebellion (1850-1864) on the mainland disrupted fiscal and monetary administration, leading to shortages of official coinage and encouraging the circulation of privately minted, often debased, copper cash and silver. This created a chaotic environment for merchants and peasants alike, where transaction values were uncertain.
Local authorities and merchant guilds attempted to manage this chaos by issuing their own
fiduciary notes and setting exchange rates, but with limited centralized control. The situation was further complicated by increased foreign economic activity following the Treaty of Tientsin (1858), which opened Tamsui and Anping as treaty ports. This solidified the position of foreign silver dollars while highlighting the inefficiency of the Qing's monetary system on the island. Thus, in 1862, Taiwan's currency landscape was one of hybridity and disorder, caught between traditional Qing systems, local adaptation, and growing foreign influence.