Linxia Hui Autonomous Prefecture
Later in the year, Zhang's launched an attack on ten other nearby prefectures with Tibetan garrisons — Gua (瓜州, in modern Jiuquan, Gansu); Yi (伊州, in modern Hami Prefecture, Xinjiang); Xi (西州, in modern Turpan Prefecture, Xinjiang); Gan (甘州, in modern Zhangye, Gansu); Su (肅州, in modern Jiuquan); Lan (蘭州, in modern Lanzhou, Gansu); Shan (鄯州, in modern Haidong Prefecture, Qinghai); He (河州, in modern Linxia Hui Autonomous Prefecture, Gansu); Min (岷州, in modern Dingxi, Gansu); and Kuo (廓州, in modern Haidong). Afterwards they prepared maps of the 11 prefectures and his brother Zhang Yize () submitted them to Xuānzong at Chang'an to prove their allegiance to the Tang dynasty. Xuānzong named the 11 prefectures Guiyi Circuit (), with its capital at Sha Prefecture, and made Zhang Yichao its military commissioner and his secretary Cao Yijin () its secretary general.