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A train enters Jimei Xuecun station in Xiamen, southeast China's Fujian Province, Dec. 31, 2017. Line 1 of Xiamen metro system began its trail operation on Sunday. (Xinhua/Lin Shanchuan)
 
 
A train enters Jimei Xuecun station in Xiamen, southeast China's Fujian Province, Dec. 31, 2017. Line 1 of Xiamen metro system began its trail operation on Sunday. (Xinhua/Lin Shanchuan)