琼州海峡
Hai'an () is a town in Xuwen County, Guangdong province, situated at the southern extremity of the Leizhou Peninsula as well as geographic mainland China, facing Haikou on Hainan Island, away, directly across the Qiongzhou Strait. It is also the southern terminus of China National Highway 207. , it has 2 residential communities () and 5 villages under its administration.