China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 https://maps.cga.harvard.edu/tgaz/placename/hvd_111107 平盧軍節度使 平卢军节度使 Pinglujun Jiedushi 防镇 防鎮 fang zhen defense command 741 4 742 4 POINT point N 39.74125 E 116.13558 唐 Tang CHGIS