Chengmai County, located in the northwest of Hainan Island, is an important part of the urban agglomeration around Beibu Gulf, adjacent to Haikou, the provincial capital. It has a history of more than 2000 years since the county was founded in the first year of Yuanfeng in the Western Han Dynasty. It is one of the three famous historical cities in Hainan in the Western Han Dynasty, with a land area of 2,072.97 square kilometers and a sea area of 470.53 square kilometers.

Haiyuzhong, West Trunk Line, Huandao West Expressway, Central Expressway, Ring Expressway, Yuehai Railway and West Ring Expressway all pass through the territory. According to the data of the seventh census, as of 0: 00 1 1 in June 2020, the permanent population of Chengmai County was 497,953.

Brief introduction of climate and topography

Chengmai County is located in the northwest of Hainan Province, adjacent to Haikou, the provincial capital, with obvious geographical advantages. The county has a total land area of 2,076 square kilometers and a total cultivated land resource of 728,000 mu, including 368,000 mu of perennial cultivated land. It has a coastline of 37.5 kilometers and a harbor 15. The county has a tropical monsoon climate, with an average annual temperature of 23.8℃, an average annual sunshine hours of 2059 hours and an average annual rainfall of 1786. 1mm, which is hot and rainy and basically frost-free.

Compared with the eastern cities and counties in the province, it is in a quiet wind environment area, and the impact of typhoon is weak. The terrain is high in the south and low in the north, with hills and mountains in the south, river plains in the middle and platforms and ocean plains in the north. Mild climate, abundant sunshine and abundant resources.