《资治通鉴·宋纪·宋纪三》
拓跋焘向东取道黑山，派平阳王长孙翰向西取道大娥山，约定在柔然汗国的王庭会师。
魏主自东道向黑山，使平阳王长孙翰自西道向大娥山，同会柔然之庭。
Emperor Taiwu of Northern Wei took the east route passing through Black Mountain, and sent Prince Changsun Han of Pingyang to lead troops marching westward via Da'e Mountain; they planned to meet at the palace of the Rouran Khanate.