《晋书·志·第十六章》
所以圣王制作没有用的货币，来流通有用的财物，既避免了物资毁坏残败的费用，又省去难以运输的麻烦，这是钱之所以在龟甲贝壳之后发挥作用，历代不能废除的原因。
故圣王制无用之货，以通有用之财，既无毁败之费，又省难运之苦，此钱所以嗣功龟贝，历代不废者也。
Therefore, the holy kings created a useless currency to circulate useful goods, which both avoids the costs of goods perishing and avoids the trouble of transportation. This is why money has been used since the days of tortoiseshell and has never been abolished.