(110531) -- RUILI, May 31, 2011 (Xinhua) -- Photo taken on July 13, 2010 shows expressways linking China and Vietnam in Wenshan, southwest China's Yunnan Province. Sharing a 4061-km borderline with Vietnam, Laos and Myanmar, Yunnan is a gateway to south and southeast Asia. The province is now on its way to greater integration with neighbouring countries in terms of traffic, trade, power grid and border control. 12 civil airports have been put to use to facilitate travel within the region, and expressways to Vietnam, Laos and Myanmar have been finished and the Yunnan section of a trans-Asian railway line is under construction. In 2010, the province has also invested over 350 million yuan (54 million U.S. dollars)in development of its 20 inland ports to promote trade along the border. (Xinhua/Lin Yiguang) (lmm)