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Mobile photo shows Qinglongqiao Station of the Beijing-Zhangjiakou railway in Yanqing District of Beijing, capital of China, Dec. 18, 2019. (Xinhua/Wang Meng)
Mobile photo shows Qinglongqiao Station of the Beijing-Zhangjiakou railway in Yanqing District of Beijing, capital of China, Dec. 18, 2019. (Xinhua/Wang Meng)