《管子·轻重丁》
周国却拿出票据作为抵押，从莱国商人手里把紫绢收购起来，莱国商人只握有等于货币的票据。
周且敛马作见于莱人操之，莱有推马。
However, the State of Zhou took out promissory notes as collateral and bought the purple silk from the merchants of the State of Lai. The merchants of the State of Lai only had promissory notes that were equivalent to currency.