7月18日凌晨，在北京地铁永安里车站，我国最早的地铁线路——北京地铁1号线成功立起第一扇屏蔽门。预计到2017年底，全线所有车站的屏蔽门安装完工。[新华社记者 罗晓光 摄]
Workers install platform screen doors at Yong'anli Station of Beijing subway Line 1 in Beijing, capital of China, July 18, 2016. Beijing began installing platform barriers on Line 1 of its subway, the oldest metro line on the Chinese mainland, which has been plagued by a spate of suicides and accidents in recent years. The entire project is expected to be completed by the end of 2017, the line's operator said. (Xinhua/Guo Yongjun)