Donghai County

Donghai
东海县
Tunghai
Donghai
Location in Jiangsu
Coordinates: 34°33′07″N 118°45′47″E / 34.552°N 118.763°E / 34.552; 118.763
CountryPeople's Republic of China
ProvinceJiangsu
Prefecture-level cityLianyungang
Area
 • County
2,037 km2 (786 sq mi)
Population
 (2020)
 • County
1,047,357
 • Density514.2/km2 (1,332/sq mi)
 • Urban
506,989
 • Rural
540,368
Time zoneUTC+8 (China Standard)
Postal code
222300

Donghai County (simplified Chinese: 东海; traditional Chinese: 東海; pinyin: Dōnghǎi Xiàn; lit. 'east sea') is under the administration of Lianyungang, Jiangsu province, China. It borders the prefecture-level cities of Linyi (Shandong) to the north and Xuzhou to the west.

The county has 300 million tons of quartz and 300,000 tons of rock crystal reserves, which is the highest in China, so it is nicknamed "the county of rock crystal".

The crystal coffin of pre-president of China, Mao Zedong was unearthed here.