Lèhuì
Lèhuì was a county on the eastern side of Hainan whose seat moved repeatedly before settling on an island in the Wànquán River. The county was first established under the Tang. In the late Yuan it moved from Diàolǎn village to the north bank of the river, then to an island south of the channel after attacks by local raiders. The Ming retained this site and built a town wall in 1572. The river and the nearby sea shaped the setting of the old county town.