China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 https://maps.cga.harvard.edu/tgaz/placename/hvd_111643 感化軍節度使 感化军节度使 Ganhuajun Jiedushi 防镇 防鎮 fang zhen defense command 870 4 901 4 POINT point N 34.26963 E 117.18768 唐 Tang CHGIS