《水经注·卷二十六》
丹水又往东北流经望海台东面，往东北注入大海，县就是依照台命名的。
丹水又东北径望海台东，东北注海，盖亦县所氏者也。
The Dan River flows northeastward past the east of Wanghaitai and flows northeastward into the sea, the county is named after the platform.