China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 https://maps.cga.harvard.edu/tgaz/placename/hvd_111682 徐泗節度使 徐泗节度使 Xusi Jiedushi 防镇 防鎮 fang zhen defense command 869 4 913 4 POINT point N 34.26963 E 117.18768 唐 Tang 后梁 Houliang CHGIS