Wubei Zhi (Vol. 86)

One official for the military defense of Lu'an, holding concurrent responsibility for the Southern Hebei circuit original: 冀南道 and acting as a regional inspector.

One official as Director of the Court of Imperial Stud original: 太僕寺卿, concurrently serving as the military defense official for Ningwu. They are tasked with ensuring the management of horse pastures and the administration of military colonies original: 屯田 without interfering with equestrian governance. They are stationed at the Ningwu Pass original: 寧武關 and share jurisdiction over the three defense commands original: 守備 of Bajiao, Shenchi, and Ningwu, as well as the local military forces under the Middle Route regional assistant commander original: 參將.

Taiyuan Prefecture

This region belongs to the territory of Jizhou as described in the Yu Gong Tribute of Yu, an ancient geography text. In terms of celestial mapping, it corresponds to the Shen and Jing constellations. It governs five departments and twenty counties.

To the east, it extends three hundred and seventy-five li a unit of distance roughly equal to 500 meters to the border of Jingxing County in Zhending Prefecture, Zhili. To the south, it extends two hundred and ten li to the border of Wuxiang County in Qinzhou. To the west, it extends five hundred and five li to the border of Wubu County in Yan'an Prefecture, Shaanxi. To the north, it extends to the border of Mayi County in Datong Prefecture.