《元史·本纪·卷九》
中书省大臣上奏说 ：交纳赋税的民户，原来的册籍上已经有了定数，至元七年新登记的、各地区互相协作调济赋税的民户，合起来共有二十万零五千一百八十户。 
中书省臣言： 赋民旧籍已有定额，至元七年新括协济合并户，为数凡二十万五千一百八十。 
The officials of the Secretariat Province reported as follows: The number of families that pay taxes is set in the original register; after the new registration during Zhiyuan 7th year, the number of families that work together in different regions for balancing taxes went up to 200,518.