380 points. According to official website of Hainan University, the lowest score line of adult college entrance examination in 2023 is 380, of which the lowest control line of cultural examination is 240, and the lowest control line of comprehensive written examination is 140. Hainan University, located in Haikou City, Hainan Province, is a university jointly founded by the Ministry of Education and the People's Government of Hainan Province.