# Chengmai County

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County in Hainan, China

Chengmai 澄迈县 County Chengmai Location in Hainan Coordinates: 19°45′7″N 110°0′57″E / 19.75194°N 110.01583°E / 19.75194; 110.01583 Country China Province Hainan Area • Total 2,067.6 km2 (798.3 sq mi) Population (2012)[1] • Total 565,000 • Density 273/km2 (708/sq mi) Time zone UTC+8 (China standard time)

**Chengmai County** ([Chinese](/source/Chinese_language): 澄迈县; [pinyin](/source/Pinyin): *Chéngmài Xiàn*) is a [county](/source/County_(China)) in [Hainan](/source/Hainan), China. It is one of four [counties](/source/County_(People's_Republic_of_China)) of Hainan. Its postal code is 571900. In 2002, its population was 490,800.[2]

## History

The first record of Chengmai County is in 110 BC, when it referred to as Guo County in one of [Emperor Wu of Han](/source/Emperor_Wu_of_Han)'s records. The county acquired its current name under the [Sui dynasty](/source/Sui_dynasty) reorganisation of 607. It was also recorded during the [Ming dynasty](/source/Ming_dynasty).

## Geography

Chengmai (labelled as CH'ENG-MAI 澄邁) (1962)

Located in northwest [Hainan](/source/Hainan), it is 56 km (35 mi) wide (east to west) and 70 km (43 mi) long (north to south). It has a total land area of 2,067.6 km2 (798.3 sq mi). Climate-wise, it is [tropical](/source/Tropical) with ample [sunshine](/source/Sunshine) and moderate [rainfall](/source/Rainfall) all year round; on average, the county receives 2060.5 hours of sunshine and 1,756 mm (69.1 in) of rain each year. The average annual temperature is 23.7 °C (74.7 °F).[3]

With a total land area of 206.7 km2 (79.8 sq mi), [melons](/source/Melons) and other tropical crops are grown around the county.

More than 20 rivers flow through the county, providing 17.4×10^9 m3 (610×10^9 cu ft) of water per year.

### Jinjiang Town

Jinjiang viewed from the south side of the [Nandu River](/source/Nandu_River)

The main settlement in the county is Jinjiang. It is located directly on the north side of the [Nandu River](/source/Nandu_River) and essentially occupies the south face of a large hill. The old section is located by the river with newer buildings further up. The backside of the hill is currently under development with mostly high-rise apartments being built. Many government buildings are situated on the top of the hill. Near the centre of the hill, there is a large park.

## Climate

Chengmai a [tropical wet and dry climate](/source/Tropical_wet_and_dry_climate) ([Köppen](/source/K%C3%B6ppen_climate_classification) *Aw*), bordering a [tropical monsoon climate](/source/Tropical_monsoon_climate) ([Köppen](/source/K%C3%B6ppen_climate_classification) *Am*).

Climate data for Chengmai, elevation 31 m (102 ft), (1991–2020 normals, extremes 1967–present) Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Record high °C (°F) 34.0 (93.2) 37.9 (100.2) 40.4 (104.7) 42.0 (107.6) 41.1 (106.0) 40.3 (104.5) 38.6 (101.5) 38.2 (100.8) 37.0 (98.6) 34.3 (93.7) 35.9 (96.6) 32.0 (89.6) 42.0 (107.6) Mean daily maximum °C (°F) 22.8 (73.0) 24.8 (76.6) 28.5 (83.3) 31.7 (89.1) 33.6 (92.5) 34.4 (93.9) 34.2 (93.6) 33.3 (91.9) 31.8 (89.2) 29.8 (85.6) 27.2 (81.0) 23.5 (74.3) 29.6 (85.3) Daily mean °C (°F) 18.0 (64.4) 19.5 (67.1) 22.6 (72.7) 25.8 (78.4) 27.7 (81.9) 28.6 (83.5) 28.5 (83.3) 27.9 (82.2) 26.8 (80.2) 24.8 (76.6) 22.3 (72.1) 19.0 (66.2) 24.3 (75.7) Mean daily minimum °C (°F) 14.9 (58.8) 16.2 (61.2) 19.0 (66.2) 21.9 (71.4) 23.9 (75.0) 24.8 (76.6) 24.8 (76.6) 24.7 (76.5) 23.9 (75.0) 21.7 (71.1) 19.2 (66.6) 15.9 (60.6) 20.9 (69.6) Record low °C (°F) 1.1 (34.0) 5.6 (42.1) 6.0 (42.8) 14.1 (57.4) 16.2 (61.2) 19.7 (67.5) 21.5 (70.7) 21.3 (70.3) 18.2 (64.8) 12.7 (54.9) 8.3 (46.9) 2.0 (35.6) 1.1 (34.0) Average precipitation mm (inches) 21.2 (0.83) 26.4 (1.04) 41.1 (1.62) 98.4 (3.87) 237.8 (9.36) 235.0 (9.25) 270.2 (10.64) 353.1 (13.90) 290.7 (11.44) 227.6 (8.96) 51.7 (2.04) 38.1 (1.50) 1,891.3 (74.45) Average precipitation days (≥ 0.1 mm) 9.4 8.6 9.3 11.8 17.7 17.3 17.4 19.0 16.6 11.4 8.6 8.7 155.8 Average relative humidity (%) 86 85 83 82 82 82 82 85 87 86 85 85 84 Mean monthly sunshine hours 91.4 95.1 128.2 153.1 187.4 193.1 206.1 182.9 146.2 140.0 110.8 85.8 1,720.1 Percentage possible sunshine 27 29 34 40 46 49 51 46 40 39 33 25 38 Source: China Meteorological Administration[4][5] all-time extreme temperature[6][7]all-time June high[8]

## Economy

The main industry is [mining](/source/Mining), with more than ten resources available within the county including [quartz](/source/Quartz), [stone](/source/Rock_(geology)), [limestone](/source/Limestone), [crystals](/source/Crystals), [gold](/source/Gold), [silver](/source/Silver), [peat](/source/Peat), [zinc](/source/Zinc), [aluminium](/source/Aluminium), [iron ore](/source/Iron_ore), [kaolin](/source/Kaolin), and [manganese](/source/Manganese). Over 5 billion tonnes of quartz are still unmined in the county, with an average grade of 99.5% [silicon](/source/Silicon). There are also nearly 11 million tonnes of [limestone](/source/Limestone) remaining in addition to crystal deposits 5.5 km (3.4 mi) long and 3 km (1.9 mi) wide and around 80,000,000 tonnes of [kaolin](/source/Kaolin).

Fish farms in Chengmai

[Fishing](/source/Fishing) also makes up a large part, with the county possessing 89.8 km (55.8 mi) of coastline. Apart from farm fishing, marine catches include [mackerel](/source/Mackerel), [redfish](/source/Redfish), [croaker fish](/source/Croaker_fish), [grouper](/source/Grouper), [pomfret](/source/Pomfret), [tuna](/source/Tuna), [squid](/source/Squid), [cuttlefish](/source/Cuttlefish), [lobster](/source/Lobster) and [shrimp](/source/Shrimp), are fished in the harbour at Tu Beach. The diverse and populous fish are a result of a nutrient-rich [sediment](/source/Sediment) at the bottom of the harbour.

## Demographics

The [Han people](/source/Han_Chinese) account for 99.5% of the population of the county.

### Longevity

The people of Chengmai County live to an average of 77.79 years. Among the population are 215 [centenarians](/source/Centenarian). The proportion of centenarians compared to the rest of the county's population, and the overall number, ranks highest of all cities and counties in China.[1][9]

Of the total 565,000 people living in the county, 18,500 are more than 80 years old, 896 of which are couples.[1][9]

## See also

- [List of administrative divisions of Hainan](/source/List_of_administrative_divisions_of_Hainan)

## References

### Citations

1. ^ [***a***](#cite_ref-chinadaily.com.cn_1-0) [***b***](#cite_ref-chinadaily.com.cn_1-1) [***c***](#cite_ref-chinadaily.com.cn_1-2) ["In Hainan's Chengmai county, age is not a problem"](http://www.chinadaily.com.cn/china/2012-11/23/content_15954935.htm). *Chinadaily.com.cn*. Retrieved 3 October 2017.

1. **[^](#cite_ref-2)** ["Chengmai County official website"](https://web.archive.org/web/20080517085613/http://chengmai.hainan.gov.cn/). Chengmai County People's Government. 2002. Archived from [the original](http://www.chengmai.hainan.gov.cn) on 2008-05-17. Retrieved 2008-10-14.

1. **[^](#cite_ref-3)** ["Chengmai County official website"](https://web.archive.org/web/20080517085613/http://chengmai.hainan.gov.cn/). Chengmai County People's Government. 2001. Archived from [the original](http://www.chengmai.hainan.gov.cn) on 2008-05-17. Retrieved 2008-10-14.

1. **[^](#cite_ref-cma_graphical_4-0)** [中国气象数据网 – WeatherBk Data](http://data.cma.cn/data/weatherBk.html) (in Simplified Chinese). [China Meteorological Administration](/source/China_Meteorological_Administration). Retrieved 17 June 2023.

1. **[^](#cite_ref-5)** [中国气象数据网](https://experience.arcgis.com/template/e724038fda394e9d9b7921f10fd1aa55/page/%E7%BA%AF%E8%A1%A8%E6%A0%BC%E7%BB%9F%E8%AE%A1-(%E5%AF%B9%E6%AF%948110%E5%8F%98%E5%8C%96)/?org=UQmaps) (in Simplified Chinese). [China Meteorological Administration](/source/China_Meteorological_Administration). Retrieved 17 June 2023.

1. **[^](#cite_ref-Mherrera_6-0)** ["Extreme Temperatures Around the World"](http://www.mherrera.org/temp.htm). Retrieved 2024-09-15.

1. **[^](#cite_ref-7)** [""海南是否会下雪？"官方回应海拔较高山顶可能结霜"](https://www.chinanews.com/sh/2021/01-12/9385336.shtml) (in Simplified Chinese). 中国新闻社. Retrieved 30 December 2025.

1. **[^](#cite_ref-8)** ["Sina Visitor System" 【海南澄迈连续40℃破纪录】今天午后澄迈气温再次冲上40℃，从4月6日-9日，连续4天上40℃，打破了当地观测史连续40℃日数的最长纪录（原纪录为3天，2020年5月6-8日）。而且未来澄迈可能还会达到40℃以上，纪录还会不断刷新。况。](https://weibo.com/1920136013/QzZQhqCUF) (in Simplified Chinese). weatherman_信欣 on [Weibo](/source/Weibo). Retrieved 9 April 2026.

1. ^ [***a***](#cite_ref-auto_9-0) [***b***](#cite_ref-auto_9-1) ["Where longevity is longstanding"](http://www.chinadaily.com.cn/cndy/2012-11/26/content_15956532.htm). *Chinadaily.com.cn*. Retrieved 3 October 2017.

### Sources

- CHGIS. ["Other Historical Datasets"](http://www.people.fas.harvard.edu/~chgis/work/downloads/faqs/1999_pop_faq.html). *People.fas.harvard.edu*. Retrieved 3 October 2017.

## External links

Wikimedia Commons has media related to [Chengmai](https://commons.wikimedia.org/wiki/Category:Chengmai).

- [Official website (Chinese)](https://web.archive.org/web/20080517085613/http://chengmai.hainan.gov.cn/)

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v t e County-level divisions of Hainan Haikou (capital) Prefecture-level cities Haikou Longhua Meilan Qiongshan Xiuying Sanya Jiyang Tianya Haitang Yazhou Sansha Xisha District Zhongsha* Nansha District Danzhou v t e Danzhou Chengqu Area* Nada town Heqing town Nanfeng town Dacheng town Yaxing town Lanyang town Guangcun town Dongcheng town Binhai Area* Sandou Subdistrict Mutang town Haitou town Eman town Wangwu town Baimajing town Zhonghe town Paipu town Xingzhou town * Not a formal administrative subdivision Hainan in China Provincial administered County-level cities Wuzhishan city Qionghai city Wenchang city Wanning city Dongfang city Counties Ding'an County Tunchang County Chengmai County Lingao County Autonomous counties Baisha County Changjiang County Ledong County Lingshui County Baoting County Qiongzhong County Township-level divisions of Hainan Politics of Hainan

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[19°45′07″N 110°00′58″E / 19.752°N 110.016°E / 19.752; 110.016](https://geohack.toolforge.org/geohack.php?pagename=Chengmai_County&params=19.752_N_110.016_E_)

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