[8] The name of Aksu Prefecture's Onsu County (Wensu) means "ten water" in Uyghur and other Turkic languages, and 'Kizilsu' in Kizilsu Kyrgyz Autonomous Prefecture means 'red water'- all of these names consist of a descriptor followed by 'su' (river; water).

On August 15, the Arabs, Tibetan Empire, and Suluk Khan of the Türgesh Khaganate formed an alliance to besiege the city of Dai-dʑiᴇk-dʑiᴇŋ (now Usi County).

[12] Following 720, the Tubo forces advanced northward into the Tarim Basin, while the Tang army re-entered Anxi in the 740s.

The Battle of Talas in 751 inflicted severe losses on the Tang army, resulting in the original four towns of Anxi falling under the influence of the Tibetan Empire and Qocho.

[15] The prefecture occupies the northwestern part of the Tarim Basin and the southern slopes of the Tian Shan.