Thanks I ' ll try that next time ! <| sep |> I don ' t know much about your team except Lillard CJ Turner . Who are the good assets and bad assets you guys would trade ? <| sep |> An alternative to coins as a form of payment was the unbyong aka hwalgu silver vases which were made from 1101 CE . The vases took the shape of the Goryeo empire and were marked as legitimate currency by having the official state seal engraved on them . Naturally , the vases contained a great deal of silver 600 g or one kun and so were only useful for large payments . Historians also suggest that they were used primarily by aristocrats and for bribing officials . Unfortunately , no examples survive , but we do know from a 1282 CE law that the value of one unbyong was fixed at between 2 , 700 and 3 , 400 litres of rice . Despite their impracticality for smaller transactions , the vases continued to be used over the next two centuries , until King Chungyol permitted rough or broken pieces of silver to be used instead at the end of the 13 th century CE . By 1331 CE the small vases shaped liked Korea itself were no longer in use .