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Workers are seen at the construction site of the Great Wall station of the Beijing-Zhangjiakou railway under the Badaling Great Wall area in Beijing, capital of China, Aug. 8, 2017. (Xinhua/Li Wen)
Workers are seen at the construction site of the Great Wall station of the Beijing-Zhangjiakou railway under the Badaling Great Wall area in Beijing, capital of China, Aug. 8, 2017. (Xinhua/Li Wen)