雷州半岛
Weizhou Island () is a Chinese island in the Gulf of Tonkin. The largest island of Guangxi Zhuang Autonomous Region, Weizhou is west of Leizhou Peninsula, south of Beihai, and east of Vietnam. Administratively, it is part of Weizhou Town, Haicheng District of Beihai City. The name derives from Chinese 潿 "wéi" ("still water") and 洲 "zhōu" ("river islet").