阿拉善盟
The Subei Mongol Autonomous County (; Mongolian: ) is an autonomous county within the prefecture-level city of Jiuquan in the northwest of Gansu Province, China, bordering Xinjiang to the west, Qinghai Province to the southeast and Mongolia's Govi-Altai Province to the north. Containing the northernmost point in Gansu, Subei is split into two non-contiguous sections and has an area of and had approximately 13,046 inhabitants in 2000. To the east it shares a border with Ejin Banner, Alxa League, Inner Mongolia.