Kāiguāng

Kaiguang lies among the loess hills west of the Yellow River, in the country drained by Kaiguang Stream. The stream, later also called Kaihuang, flows southeast to join the Tuwei River. An old county of Kaiguang stood on a route between Yinzhou and the northern frontier; local gazetteers also preserve the name Kaiguang Valley in accounts of Song military expeditions. In the Ming, the valley remained a setting for frontier fighting, including a battle recorded there in 1470.