sentences:  In the year 1282 the government enacted a law that pegged the value of one ŭnbyŏng at between 2,700 and 3,400 litres of rice.But regardless of the fact that this currency was highly impractical for paying for low value items, the ŭnbyŏng would continue to be used during the next two centuries.During the reign of Chungnyeol of Goryeo the government had permitted the circulation of rough or broken pieces of silver.