Country/territory: China (mainland)
Central coordinates (latitude / longitude): 30°58'00"N (30.9667°) / 121°54'00"E (121.9000°)
Area (reported): 12,250 hectares / 122.50 km² / 30,270 acres / 47.30 square miles
Area (GIS-derived): 11,616 hectares / 116.16 km² / 28,704 acres / 44.85 square miles
Altitude: 0–5 m (0–16 ft)