一、地域相近、干线相同,腹地相叠以及其他方面存在的共性是广西沿海主要港口——北海、钦州、防城三港联盟的基础和前提北海、钦州、防城三个港口同属东南亚邻国与我国西南地区所形成的两个扇面的枢纽位置。三个港口距离较近,广西滨海公路通车后三港相距不到100公里,北、钦、防三港在钦州湾形成一个三角形的港口布局,人称为“金三角”。三个港口之间海陆交通非常便利。三港除了肩负各自城市及周边货物进出口外,还要把揽货的重心放在最有潜势的西南地区大宗矿产资源上。然而三港接纳西南地区的货源进出都是沿着基本相同的铁路干线南昆、黔桂、枝柳、湘桂和公路干线重庆到广西沿海城市的高等公路,因此,广西沿海三港主要经济腹地同属我国西南地区诸省市。北、钦、防三港同属一个行政区（省）,有利于区（省）政府主管部门对三港联盟前后的行政管理和协调,早在90年代初广西 First, geographical similar, the same line, overlapping hinterland and other commonalities exist in Guangxi coastal ports - the North Sea, Qinzhou, Fangcheng three port alliance of the foundation and premise Beihai, Qinzhou, Fangcheng three ports belong to the neighboring countries in Southeast Asia And the pivotal position of the two sectors formed by the southwest of our country. The three ports are relatively close. The opening of the coastal highway in Guangxi is less than 100 km away from the port of San-hong. The northern, imperial and anti-three ports form a triangular port layout in Qinzhou Bay, which is called the Golden Triangle. Sea and land transport between the three ports is very convenient. In addition to three ports in Hong Kong shoulder the respective cities and the surrounding import and export of goods, but also the focus of Lanhuo on the most potential bulk of Southwest China’s mineral resources. However, the import and export of goods in southwest China from the three ports are all along the same highways of the same main railway lines as Nankun, Qiangui, Zhiliu, Xianggui and the main road from Chongqing to the coastal cities in Guangxi. Therefore, Belong to all provinces and cities in southwest China. North, Chin and anti-Sansha belong to one administrative region (province), is conducive to the district (provincial) government departments before and after the three Hong Kong Union administration and coordination, as early as the early 90’s in Guangxi