《天工开物·中篇·冶铸》
一个大钱的面值相当于普通铜钱的五倍或者十倍，发行这种大钱的弊病是容易导致私人铸钱，反而会坑害了百姓，所以，中央和地方都在发行过一阵儿大钱之后，很快就停止发行了。
其大钱当五、当十，其弊便于私铸，反以害民，故中外行而辄不行也。
The face value of a large coin is equivalent to five or ten times that of an ordinary copper coin. The disadvantage of issuing such a large coin is that it is easy to cause private coin casting, which in turn will harm the people. Therefore, both the central and local governments have After issuing large coins for a while, they stopped issuing them soon afterwards.