Sun Island evolved from the transliteration of Manchu Mandarin brandfish. There are three kinds of Manchu names for brandfish color - "one is common brandy flower "sea flower", one is black brandy flower "Falu", and the other is round brandy flower "Taiyian", which is very similar to "Sun". That is to say, "Sun" of Sun Island means "sea brandy". It is said that the hills inside the island are all clean fine sand, especially hot in the sunshine, so it is called the Sun Island.