Photo taken on Aug. 20, 2017 shows safty doors at Qianmen Station on Line 2 of the subway in Beijing, capital of China. By Sunday, all stations on Line 2 of Beijing Subway are enabled with safety doors. (Xinhua/Du Jianpo)
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Photo taken on Aug. 20, 2017 shows safty doors at Qianmen Station on Line 2 of the subway in Beijing, capital of China. By Sunday, all stations on Line 2 of Beijing Subway are enabled with safety doors. (Xinhua/Du Jianpo)
