Why doesn't Hainan give priority to Li nationality?

Influenced by history. In ancient China, Hainan belonged to the South China Sea Islands and was occupied or controlled by many countries such as the Eastern Han Dynasty, South Vietnam, Wu, Tang, Song, Yuan, Ming and Qing. During these periods, the residents of Hainan were mainly Han people and immigrants from all over the world. Li nationality mainly migrated and spread in the southeast of Hainan Island, occupying the local mountainous areas and coastal areas, but it did not become the main ethnic group in Hainan.