《北史·列传·卷四十三》
他跟随高欢到邙山，即将开战，却丢失了作战用的地图，元康冒险找到了它。
从神武于芒山，将战，遗失阵图，元康冒险求得之。
He followed Gao Huan to Mang Mountain, and just as they were about to go into battle, he lost the map for the operation, but Yuan Kang found it in a heroic act.