TheBeibu Gulf Economic Rim[1] orBeibu Economic Belt (simplified Chinese:环北部湾经济圈;traditional Chinese:環北部灣經濟圈;pinyin:Huán Běi bù wān jīng jì quān) also known asGulf of Tonkin Economic Belt in (Vietnamese: Vành đai kinh tế vịnh Bắc Bộ) defines the economic region or rim surrounding around China's southwestern coastal region and cities around theGulf of Tonkin. The region is part of Chinese government's"Go West" strategy, to boost its less developed western regions. The implementation of the campaign, has resulted in many construction projects in cities on the Beibu Gulf Rim, especially inGuangxi.[2] The Beibu Gulf economic rim has emerged as a new highlight of China-ASEAN cooperation, especially with Vietnam, who is also cooperating in this economic zone. It covers Guangdong, Hainan and Guangxi, and northern and central Vietnam.[3][4]

The cooperation scope includes trade, investment, exploitation of marine, tourism, and oceanic environmental protection.