处于中国东南边陲闽粤之交南澳岛的深澳、长沙尾澳,至迟在南宋时已成为沟通中国东南沿海及海外贸易的两个重要港口,同时也是宋元以来东南地区,尤其是闽粤边界海盗之渊薮。至明代中后期以后,整个南澳的名称由“三澳”演变为“四澳”。 Shenzhen and Macao, which are on the island of Nan’ao at the junction of Fujian, Guangdong and southeast of China, are the two important ports to communicate the southeast coast of China and overseas trade by the time of the Southern Song Dynasty. They are also the major cities in Southeast China, Borders of the border of pirates. After the middle and late Ming Dynasty, the name of the entire South Australia evolved from “three O” to “four O”.