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Chinese State Councilor Dai Bingguo (R, C) shakes hands with Vietnamese Deputy Prime Minister Pham Gia Khiem after unveiling the No. 1117 boundary marker in Pingxiang City in south China's Guangxi Zhuang Autonomous Region, opposite to Lang Son City of Vietnam, Feb. 23, 2009. China and Vietnam Monday marked the final demarcation of their land border at the Youyiguan border gate in Pingxiang City in south China's Guangxi Zhuang Autonomous Region. More than 400 government officials and about 400 representatives from both countries, including those who attended the land border demarcation, were present at a ceremony after the demarcation. [Xinhua]