《北史·列传·卷二十六》
中道从高昌、焉耆、龟兹、疏勒，越过葱岭，又经过钹汗、苏勒沙那国、康国、曹国、何国、大安国、小安国、穆国，经由波斯，到达西海。
其中道从高昌、焉耆、龟兹、疏勒，度葱岭，又经汗、苏勒沙那国、康国、曹国、何国、大小安国、穆国，至波斯，达于西海。
The middle road goes from Gaochang, Yengi, Kucha, and Shule, over the Pamir Mountains, and through Bachan, Sule Shana Kingdom, Kang Kingdom, Cao Kingdom, He Kingdom, Da'an Kingdom, Xiao'an Kingdom, Mu Kingdom, via Persia, to the West Sea.