北部湾包括广西沿海地区、广东雷州半岛、海南西部沿海地区以及越南北部沿海地区；大西南系指云南、贵州、四川、西藏、广西、重庆。北部湾地区与大西南联动开发，实际上是沿海与内陆的经济联动——“山”与“海”的联姻，是地缘上两个相连的经济区域在同一开放格局下的优势互 The northern Gulf includes the coastal areas of Guangxi, Leizhou Peninsula in Guangdong, the western coastal areas of Hainan and the northern coastal areas of Vietnam; the Greater Southwest refers to Yunnan, Guizhou, Sichuan, Tibet, Guangxi and Chongqing. The joint development between the Beibu Gulf and the Greater Southwest is actually the economic linkage between the coast and the inland - the marriage of “mountain” and “sea” is the mutual advantage of the two adjacent economic regions under the same open pattern