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A merchant from Vietnam arranges commodities in his shop at Hekou, a county along the China-Vietnam border in southwest China's Yunnan Province, April 11, 2017. (Xinhua/Lin Yiguang)
 
 
A merchant from Vietnam arranges commodities in his shop at Hekou, a county along the China-Vietnam border in southwest China's Yunnan Province, April 11, 2017. (Xinhua/Lin Yiguang)