《元史·本纪·卷三十一》
十八日，监察御史上言 ：岭北行省，控制一方，幅员有万里之广，实为太祖创建基业之地，关系到国家的根本。
乙巳，监察御史言： 岭北行省，控制一方，广轮万里，实为太祖肇基之地，国家根本系焉。
On the eighteenth day, the Censorate reported to the emperor that the Lingbei Provincial Administration, which governed a vast territory of ten thousand square li, was the cradle of the Taizu’s (Kublai’s) empire and was of vital importance to the stability of the country.