Cheng County

Cheng County or Chengxian (simplified Chinese: 成县; traditional Chinese: 成縣; pinyin: Chéng Xiàn) is a county under the administration of Longnan City, in southeastern Gansu Province of China. It has a land area of 1,780 square kilometers and a population of 250,000 in 2004. The postal code is 742500, and the county seat is located in Chengguan Town.

Cheng County
成县
Chifeng Mountain National Forest Park
Cheng County
Location of the seat in Gansu
Coordinates: 33°55′N 105°40′E
CountryChina
ProvinceGansu
Prefecture-level cityLongnan
County seatChengguan (城关镇)
Area
  Total1,780 km2 (690 sq mi)
Population
 (2019)
  Total246,900
  Density140/km2 (360/sq mi)
Time zoneUTC+8 (China Standard)
Postal code
742500
Websitewww.gs.xinhuanet.com/chengxian/index.htm

Located between mountains, it has a temperate climate, favourable for agriculture. The mountains have lead and zinc ore deposits.

Chengxian is noted for its walnut production. Chengxian walnuts were designated a protected origin product in China in 2014.

In January 2021, the Qingni River in Chengxian was found to be polluted with thallium from zinc production wastewater.

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