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In this aerial photo taken on April 2, 2019, a Line S2 train of Beijing Suburban Railway (BSR) stops at Qinglongqiao station of the Beijing-Zhangjiakou railway in Beijing, capital of China. (Xinhua/Ju Huanzong)
In this aerial photo taken on April 2, 2019, a Line S2 train of Beijing Suburban Railway (BSR) stops at Qinglongqiao station of the Beijing-Zhangjiakou railway in Beijing, capital of China. (Xinhua/Ju Huanzong)