China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 https://maps.cga.harvard.edu/tgaz/placename/hvd_111509 永平節度使 永平节度使 Yongping Jiedushi 防镇 防鎮 fang zhen defense command 784 4 784 4 POINT point N 35.62207 E 114.62544 唐 Tang CHGIS