China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 https://maps.cga.harvard.edu/tgaz/placename/hvd_112370 平原國 平原国 Pingyuan Guo 国 國 guo country 147 3 205 3 POINT point N 37.02058 E 116.43802 东汉 Donghan 东汉 Donghan 东汉 Donghan 东汉 Donghan CHGIS