《宋书·列传·卷八十二》
现在应该允许集市到一千钱以下的可以用钱，其余的都用丝绢布匹和大米作交易，其中米布不合格的予以惩罚。
今且听市至千钱以还者用钱，余皆用绢布及米，其不中度者坐之。
Now, marketplaces should be allowed to use money under one thousand qian, the rest should all transact with silk, cloth, and rice, disqualified rice and cloth should be punished.