A major mountain range in northern Hebei province, northern China

(literary) Alternate name for 燕然山 yān​rán​shān in central Mongolia, famous for the stone inscriptions of the Eastern Han dynasty

(literary) A reference to King Zhao of the Yan state during the Warring States period, known for his recruitment of talented scholars

(literary) Metonym for the northern border or frontier regions, often appearing in classical poetry