Which city does Chengmai County belong to?

Chengmai county does not belong to all the cities in Hainan. Chengmai County is directly under the jurisdiction of Hainan Province and is a county-level administrative unit directly under the jurisdiction of Hainan Province. Chengmai County is located in the northwest of Hainan Island. It has been more than 2000 years since it was established in the first year of Yuanfeng in the Western Han Dynasty (BC 1 10). It is one of the three famous historical cities in Hainan in the Western Han Dynasty (namely tortoise shell, purple shell and chicory). Chengmai County is located in the northwest of Hainan Island, bordering Qiongzhou Strait in the north and Leizhou Peninsula in Guangdong across the sea. It is adjacent to Haikou and Ding 'an County, the provincial capital, Lingao County and Danzhou City in the east and Tunchang and Qiongzhong County in the south, with a total area of 2,076 square kilometers. Chengmai County is a county-level administrative unit directly under the provincial government and belongs to the county-level administrative region. The administrative region at the next higher level is the provincial administrative region, and the administrative region at the next lower level is the township administrative region. The upper administrative region of Chengmai County is Hainan Province.