《北史·列传·卷八十四》
从西平临羌城以西，且末以东，祁连以南，雪山以北，东西四千里，南北二千里都被隋朝占有。
自西平临羌城以西，且末以东，祁连以南，雪山以北，东西四千里，南北二千里皆为隋有。
From Xiping Linqiang City in the west, and Yiwu in the east, Qilian in the south and the Snow Mountains in the north, for 4000 li from east to west and 2000 li from north to south, all was occupied by the Sui Dynasty.