《资治通鉴·隋纪·隋纪四》
另外还制作了西域地图，上面包括了西域所有重要的地点，从西倾山开始，纵横连亘将近二万里。从敦煌出发，到达西海，共分为三条路：北路从伊吾起，中路从高昌起，南路从鄯善起，总汇到敦煌。
仍别造地图，穷其要害，从西倾以去，纵横所亘，将二万里，发自敦煌，至于西海，凡为三道，北道从伊吾，中道从高昌，南道从鄯善，总凑敦煌。
He also produced a map of the Western Regions, which included all the important places in the Western Regions, starting from the X傾Mountains, and extending over nearly 20,000 miles. Starting from Dunhuang and reaching the Western Sea, there were three routes: the northern route started from Yiwu, the central route started from Gaochang, and the southern route started from Shanshan, all converging on Dunhuang.