《魏书·帝纪·卷二》
慕容垂于是到达平城西北，跨山扎营，听说皇帝将要到来，便筑城守卫。
垂遂至平城西北，逾山结营。闻帝将至，乃筑城自守。
Murong Chui then reached northwest of Pingcheng and set up camp across the mountain. Hearing that the emperor was about to arrive, he built a city for defense.