Country/territory: China (mainland)
Central coordinates (latitude / longitude): 29°55'00"N (29.9167°) / 116°02'59"E (116.0500°)
Area (reported): 22,322 hectares / 223.22 km² / 55,159 acres / 86.19 square miles
Area (GIS-derived): 12,546 hectares / 125.46 km² / 31,002 acres / 48.44 square miles
Altitude: 20 m (66 ft)