Aerial photo taken on Jan. 10, 2017 shows the exit of Liaoxi Tunnel, the longest tunnel along the Beijing-Shenyang high-speed railway, in Lingyuan City, northeast China's Liaoning province. The 13.205 km tunnel constructed by China Railway 12th Bureau Group is also the longest one within northeast China by far. (Xinhua/Yang Qing)

Construction team celebrates the breakthrough of Liaoxi Tunnel, the longest tunnel along the Beijing-Shenyang high-speed railway, in Lingyuan City, northeast China's Liaoning province, Jan. 10, 2017. The 13.205 km tunnel constructed by China Railway 12th Bureau Group is also the longest one within northeast China by far. (Xinhua/Yang Qing)

Beijing Municipal Government published this content on 11 January 2017 and is solely responsible for the information contained herein.
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