sentences:  The creation of the flying cash happened after a tax reform that allowed for the partial acceptance of taxes in money, which had increased the demand for currency which scared the government that merchants would remove cash coins from the capital to circulate so they ordered the local governments to set up monetary systems based on silk, other fabrics, and daily items akin to barter which hampered long-distance trade in the Tang dynasty and harmed the national economy.The people that had the largest benefit from the introduction of flying cash were tea merchants and these merchant helped improve the trade between the capital and the regions.Originally the government of the Tang dynasty was less than receptive to the idea of bills of exchange and had attempted banning them on multiple occasions, but in 812 flying cash were officially accepted as a valid means of exchange.