In 702 Wu Zetian set up the Beiting Protectorate in Ting Prefecture (Jimsar County) and granted it governorship over Yi Prefecture (Hami) and Xi Prefecture (Gaochang).[3]
In 715 the Tibetan Empire attacked the Beiting Protectorate.[4]
In 755 the An Lushan Rebellion occurred and the Tang dynasty withdrew 200,000 soldiers from the Western Regions to protect the capital.[6]
In 764 the Tibetan Empire invaded the Hexi Corridor and conquered Liang Prefecture,[7] cutting off the Anxi and Beiting from the Tang dynasty. However the Anxi and Beiting protectorates were left relatively unmolested under the leadership of Guo Xin and Li Yuanzhong.[8]
In 780 Li Yuanzhong was officially made protectorate general of Beiting after sending secret messages to Emperor Dezong of Tang.[9]
In the immediate aftermath of the Tibetan conquest of Xi Prefecture, it was taken by the Uyghur Khaganate, after which the area became the border between the two empires.[12]
Zhang Yichao rebelled against Tibetan rule in Sha Prefecture (Dunhuang) in 848. In 850 he recaptured Yi Prefecture, in 851 Xi Prefecture, and in 866 Ting Prefecture. However he immediately lost Ting and Xi prefectures as well as Luntai (Ürümqi) to the Kingdom of Qocho. In 876 Yi Prefecture was also captured by the Kingdom of Qocho.
Unearthed at the Astana Graves in 1972 from the tomb number 187. The background contains a bamboo plant. The image was to the right side of an image of a woman playing go. The tomb also contained a copy of the book "Tian Bao San Zai" dated to the year 744.
Unearthed at the Astana Graves in 1972 from the tomb of Zhang Lichen (655-702).
Unearthed in 1972 from the tomb of Zhang Lichen (655-702).
Unearthed at the Astana Graves from the tomb number 187
Unearthed at the Astana Graves from the tomb number 187
Unearthed at the Astana Graves from the tomb number 187
Unearthed at the Astana Graves in 1972 from the tomb number 187. The tomb also contained a copy of the book "Tian Bao San Zai" dated to the year 744.
^"舊唐書". 中國哲學書電子化計劃. Retrieved August 3, 2017. 上元元年，河西軍鎮多為吐蕃所陷。有舊將李元忠守北庭，郭昕守安西府，二鎮與沙陀、回鶻相依，吐蕃久攻之不下。In the first year of the Shangyuan era [760], the Hexi Army Defense Command fell to the Tibetans. Beiting and Anxi were guarded by Li Yuanzhong and the old general Guo Xin, who along with the Shatuo and Uyghurs, were able to prevent the Tibetans from taking the two garrisons.
^"舊唐書". 中國哲學書電子化計劃. Retrieved August 3, 2017. 建中元年，元忠、昕遣使間道奏事，德宗嘉之，以元忠為北庭都護，昕為安西都護。In the first year of the Jianzhong era [780], Yuanzhong and Xin dispatched envoys through a remote path to memorialize the emperor. Dezong commended them and Yuanzhong became protector-general of Beiting while Xin became protector-general of Anxi.
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