《元史·本纪·卷十七》
三十日，福建行省参政魏天佑献计，调发一万名百姓开山炼银，每年可得一万五千两。
戊午，福建行省参政魏天祐献计，发民一万凿山炼银，岁得万五千两。
On the 30th, Counselor of Fujian Province Wei Tianyou presented a plan, ordering 10,000 civilians to go smelting silver in the mountain, which can produce 15,000 taels annually.