China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 https://maps.cga.harvard.edu/tgaz/placename/hvd_111790 保大軍節度使 保大军节度使 Baodajun Jiedushi 防镇 防鎮 fang zhen defense command 882 3 962 3 POINT point N 35.99563 E 109.36716 唐 Tang 五代岐 Wudaiqi 后唐 Houtang 后晋 Houjin 后汉 Houhan 后周 Hou Zhou 北宋 Beisong CHGIS