Which city does Chengmai County in Hainan Province belong to?

It is not under the jurisdiction of the city, but a county directly under the jurisdiction of Hainan Province. As of March 4, 2024, Chengmai County is a county-level administrative unit directly under Hainan Province and does not belong to the category of any city. Chengmai County is the hometown of longevity in the world, a land rich in selenium and a famous green county in China. It is located in the northwest of Hainan Island, adjacent to Haikou, the provincial capital, and across the sea from Leizhou Peninsula. Because the ancient county ruled the old city with "Chengjiang" and "Mailing", it was named "Chengmai". 1March, 967, under the Arms Control Committee of Hainan District, Guangdong Province. 1April, 968 was affiliated to the Revolutionary Committee of Hainan Administrative Region, Guangdong Province. 1980 1 month, under the office of Hainan administrative region, Guangdong province. 1984 10, People's Government of Hainan Administrative Region, Guangdong Province. 1April, 988, Hainan Province was established, and Zhili Hainan Province.