燕云十六州 (燕雲十六州) yānyún shíliù zhōu

yānyún shíliù zhōu proper noun Sixteen Prefectures
Domain: History 历史 , Subdomain: China , Concept: Region 地区
Notes: An area of contention between Han Chinese and the Khitan People, stretching from present day Beijing (Yan) to Yungang Caves near Datong, Shanxi