{{Infobox settlement |name = Chengmai |native_name = {{nobold|{{lang|zh-hans|澄迈县}}}} |pushpin_map = Hainan |pushpin_map_caption = Location in Hainan |settlement_type = [[CPRC|County]] |image_skyline = Chengmai - skyline viewed from south side of Nandu River.jpg |image_map = |map_caption = |subdivision_type = Country |subdivision_name = China |subdivision_type1 = [[Provinces of China|Province]] |subdivision_name1 = [[Hainan]] |unit_pref = Metric |area_total_km2 = 2067.6 |population_as_of = 2012 |population_density_km2 = auto |population_total = 565000 | population_footnotes = <ref name="chinadaily.com.cn">{{cite web|url=http://www.chinadaily.com.cn/china/2012-11/23/content_15954935.htm|title=In Hainan's Chengmai county, age is not a problem|website=Chinadaily.com.cn|accessdate=3 October 2017}}</ref> |coordinates = {{coord|19|45|7|N|110|0|57|E|region:CN-46|display=inline}} |elevation_ft = |elevation_m = |timezone = [[China standard time]] |utc_offset = +8 |website = }} '''Chengmai County''' ({{zh|c=澄迈县 |p=Chéngmài Xiàn}}) is a [[County (China)|county]] in [[Hainan]], China. It is one of four [[County (People's Republic of China)|counties]] of Hainan. Its postal code is 571900. In 2002, its population was 490,800.<ref>{{Cite web |url=http://www.chengmai.hainan.gov.cn |title=Chengmai County official website |accessdate=2008-10-14 |publisher=Chengmai County People's Government |year=2002 |archive-url=https://web.archive.org/web/20080517085613/http://chengmai.hainan.gov.cn/ |archive-date=2008-05-17 |url-status=dead }}</ref>
==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]]'s records. The county acquired its current name under the [[Sui dynasty]] reorganisation of 607. It was also recorded during the [[Ming dynasty]].
==Geography== [[File:Txu-oclc-10552568-ne49-2.jpg|left|thumb|Chengmai (labelled as CH'ENG-MAI {{lang|zh-hant|澄邁}}) (1962)]] Located in northwest [[Hainan]], it is {{convert|56|km|abbr=on}} wide (east to west) and {{convert|70|km|abbr=on}} long (north to south). It has a total land area of {{convert|2067.6|km2|abbr=on}}. Climate-wise, it is [[tropical]] with ample [[sunshine]] and moderate [[rainfall]] all year round; on average, the county receives 2060.5 hours of sunshine and {{convert|1756|mm|abbr=on}} of rain each year. The average annual temperature is {{convert|23.7|°C}}.<ref>{{Cite web |url=http://www.chengmai.hainan.gov.cn |title=Chengmai County official website |accessdate=2008-10-14 |publisher=Chengmai County People's Government |year=2001 |archive-url=https://web.archive.org/web/20080517085613/http://chengmai.hainan.gov.cn/ |archive-date=2008-05-17 |url-status=dead }}</ref>
With a total land area of {{convert|206.7|km2|abbr=on}}, [[melons]] and other tropical crops are grown around the county.
More than 20 rivers flow through the county, providing {{convert|17.4|e9m3|abbr=on}} of water per year.
===Jinjiang Town=== [[File:Jinjiang Town - rooftop view.jpg|thumbnail|Jinjiang viewed from the south side of the [[Nandu River]]]] The main settlement in the county is Jinjiang. It is located directly on the north side of the [[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]] ([[Köppen climate classification|Köppen]] ''Aw''), bordering a [[tropical monsoon climate]] ([[Köppen climate classification|Köppen]] ''Am''). {{Weather box | width = auto | metric first = y | single line = y | collapsed = Y | location = Chengmai, elevation {{convert|31|m|ft|abbr=on}}, (1991–2020 normals, extremes 1967–present) | Jan high C = 22.8 | Feb high C = 24.8 | Mar high C = 28.5 | Apr high C = 31.7 | May high C = 33.6 | Jun high C = 34.4 | Jul high C = 34.2 | Aug high C = 33.3 | Sep high C = 31.8 | Oct high C = 29.8 | Nov high C = 27.2 | Dec high C = 23.5 | Jan mean C = 18.0 | Feb mean C = 19.5 | Mar mean C = 22.6 | Apr mean C = 25.8 | May mean C = 27.7 | Jun mean C = 28.6 | Jul mean C = 28.5 | Aug mean C = 27.9 | Sep mean C = 26.8 | Oct mean C = 24.8 | Nov mean C = 22.3 | Dec mean C = 19.0 | Jan low C = 14.9 | Feb low C = 16.2 | Mar low C = 19.0 | Apr low C = 21.9 | May low C = 23.9 | Jun low C = 24.8 | Jul low C = 24.8 | Aug low C = 24.7 | Sep low C = 23.9 | Oct low C = 21.7 | Nov low C = 19.2 | Dec low C = 15.9 | Jan record high C = 34.0 | Jan record low C = 1.1 | Feb record high C = 37.9 | Feb record low C = 5.6 | Mar record high C = 40.4 | Mar record low C = 6.0 | Apr record high C = 42.0 | Apr record low C = 14.1 | May record high C = 41.1 | May record low C = 16.2 | Jun record high C = 40.3 | Jun record low C = 19.7 | Jul record high C = 38.6 | Jul record low C = 21.5 | Aug record high C = 38.2 | Aug record low C = 21.3 | Sep record high C = 37.0 | Sep record low C = 18.2 | Oct record high C = 34.3 | Oct record low C = 12.7 | Nov record high C = 35.9 | Nov record low C = 8.3 | Dec record high C = 32.0 | Dec record low C = 2.0 | year high C = | year low C = | year high F = | year low F = | precipitation colour = green | Jan precipitation mm = 21.2 | Feb precipitation mm = 26.4 | Mar precipitation mm = 41.1 | Apr precipitation mm = 98.4 | May precipitation mm = 237.8 | Jun precipitation mm = 235.0 | Jul precipitation mm = 270.2 | Aug precipitation mm = 353.1 | Sep precipitation mm = 290.7 | Oct precipitation mm = 227.6 | Nov precipitation mm = 51.7 | Dec precipitation mm = 38.1 | Jan humidity = 86 | Feb humidity = 85 | Mar humidity = 83 | Apr humidity = 82 | May humidity = 82 | Jun humidity = 82 | Jul humidity = 82 | Aug humidity = 85 | Sep humidity = 87 | Oct humidity = 86 | Nov humidity = 85 | Dec humidity = 85 | unit precipitation days = 0.1 mm | Jan precipitation days = 9.4 | Feb precipitation days = 8.6 | Mar precipitation days = 9.3 | Apr precipitation days = 11.8 | May precipitation days = 17.7 | Jun precipitation days = 17.3 | Jul precipitation days = 17.4 | Aug precipitation days = 19.0 | Sep precipitation days = 16.6 | Oct precipitation days = 11.4 | Nov precipitation days = 8.6 | Dec precipitation days = 8.7 | year precipitation days = | Jan sun = 91.4 | Feb sun = 95.1 | Mar sun = 128.2 | Apr sun = 153.1 | May sun = 187.4 | Jun sun = 193.1 | Jul sun = 206.1 | Aug sun = 182.9 | Sep sun = 146.2 | Oct sun = 140.0 | Nov sun = 110.8 | Dec sun = 85.8 | year sun = | Jan percentsun = 27 | Feb percentsun = 29 | Mar percentsun = 34 | Apr percentsun = 40 | May percentsun = 46 | Jun percentsun = 49 | Jul percentsun = 51 | Aug percentsun = 46 | Sep percentsun = 40 | Oct percentsun = 39 | Nov percentsun = 33 | Dec percentsun = 25 | year percentsun = | source 1 = [[China Meteorological Administration]]<ref name="cma graphical">{{cite web |url=http://data.cma.cn/data/weatherBk.html |script-title=zh:中国气象数据网 – WeatherBk Data |publisher=[[China Meteorological Administration]] |language = zh-hans |access-date=17 June 2023}}</ref><ref> {{cite web|url=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 |script-title=zh:中国气象数据网|publisher=[[China Meteorological Administration]] |language = zh-hans | access-date =17 June 2023}}</ref> all-time extreme temperature<ref name = Mherrera>{{cite web |url= http://www.mherrera.org/temp.htm |title= Extreme Temperatures Around the World |access-date= 2024-09-15 }}</ref><ref>{{cite web |url=https://www.chinanews.com/sh/2021/01-12/9385336.shtml|publisher=中国新闻社 |language = zh-hans | access-date =30 December 2025 |title=“海南是否会下雪？”官方回应海拔较高山顶可能结霜 }}</ref>all-time June high<ref>{{cite web|url=https://weibo.com/1920136013/QzZQhqCUF |script-title=zh: 【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。|publisher=weatherman_信欣 on [[Weibo]] |language = zh-hans | access-date = 9 April 2026 |title=Sina Visitor System }}</ref> | source = }}
==Economy== The main industry is [[mining]], with more than ten resources available within the county including [[quartz]], [[Rock (geology)|stone]], [[limestone]], [[crystals]], [[gold]], [[silver]], [[peat]], [[zinc]], [[aluminium]], [[iron ore]], [[kaolin]], and [[manganese]]. Over 5 billion tonnes of quartz are still unmined in the county, with an average grade of 99.5% [[silicon]]. There are also nearly 11 million tonnes of [[limestone]] remaining in addition to crystal deposits {{convert|5.5|km|abbr=on}} long and {{convert|3|km|abbr=on}} wide and around 80,000,000 tonnes of [[kaolin]]. [[File:Fish farms in Chengmai - 01.jpg|thumb|right|Fish farms in Chengmai]]
[[Fishing]] also makes up a large part, with the county possessing {{convert|89.8|km|abbr=on}} of coastline. Apart from farm fishing, marine catches include [[mackerel]], [[redfish]], [[croaker fish]], [[grouper]], [[pomfret]], [[tuna]], [[squid]], [[cuttlefish]], [[lobster]] and [[shrimp]], are fished in the harbour at Tu Beach. The diverse and populous fish are a result of a nutrient-rich [[sediment]] at the bottom of the harbour.
==Demographics== The [[Han Chinese|Han people]] 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 [[centenarian]]s. 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.<ref name="chinadaily.com.cn"/><ref name="auto">{{cite web|url=http://www.chinadaily.com.cn/cndy/2012-11/26/content_15956532.htm|title=Where longevity is longstanding|website=Chinadaily.com.cn|accessdate=3 October 2017}}</ref>
Of the total 565,000 people living in the county, 18,500 are more than 80 years old, 896 of which are couples.<ref name="chinadaily.com.cn"/><ref name="auto"/>
==See also== * [[List of administrative divisions of Hainan]]
== References == === Citations === {{Reflist}}
=== Sources === {{refbegin}} * {{cite web |url = http://www.people.fas.harvard.edu/~chgis/work/downloads/faqs/1999_pop_faq.html |title = Other Historical Datasets |author=CHGIS |website=People.fas.harvard.edu |access-date=3 October 2017 }} {{refend}}
==External links== {{Commons category|Chengmai}} * [https://web.archive.org/web/20080517085613/http://chengmai.hainan.gov.cn/ Official website (Chinese)]
{{Hainan topics}} {{Hainan}} {{Prefectural-level divisions of the People's Republic of China}}
{{Coord|19.752|N|110.016|E|display=title}}
{{authority control}}
[[Category:County-level divisions of Hainan|Chengmai County]]