Border area of China has long history trade relation and cultural exchange with neighboring countries, as result, there have been various intra-passes which still work for communication and transportation. Westward opening, one belt one road strategy is a key instrument for China’s further opening, a essential feather of coordinated regional development, and they will be a great opportunity for the development of border area. Historically review the communication and exchange of border area, will be helpful to understand its role in westward opening strategy, and take its location advantage in international cooperation. In which Tibet would be a frontier of China-south Asia, a shout-cut to south Asia market, a key region need to be constructed and developed.%我国沿边地区自古就与邻国进行商品往来、文化交流，在长期历史交往中形成了许多对外通道，它们至今仍在发挥着重要作用。向西开放、一带一路建设是我国完善对外开放格局的重要举措，是我国对外开放与区域经济协调发展新阶段的重要特征，将为沿边地区带来新的历史性发展机遇。回顾边境地区对外通道和对外交往情况，有助于认识其在向西开放战略中的重要作用，发挥其作为对外开放前沿的功能。在沿边开放中，南亚通道的建设相对薄弱，特别是毗邻南亚、占全国边境线总长近1/4的西藏，构建与邻国互联互通的基础设施网络，建设对南亚现代化的通道尤为重要，需要加强。
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