Protectorate General to Pacify the North

It was first established as Yanran at Shanyu Tai, southwest of present-day Urat Middle Banner, the northern slope of Lang Shan.

The six commanderies were Hanhai (翰海府), Jinwei (金微府), Yanran (燕然府), Youling (幽陵府), Guilin (龜林府), and Lushan (盧山府).

The seven prefectures were Gaolan (皐蘭州), Gaoque (高闕州), Jilu (雞鹿州), Jitian (雞田州), Yuxi (榆溪州), Dailin (蹛林州), and Douyan (竇顏州).

[6] In 683, Ilterish Qaghan besieged the Chanyu Protectorate and killed the adjutant Zhang Xingshi.

[5] In 708 the seat of Anbei was moved to the Western Shouxiang city near modern Wuyuan County, Inner Mongolia.

[5] In 714 the Chanyu Protectorate was revived in Yunzhong while Anbei was re-located to the Middle Shouxiang city, near modern Baotou.