Laborers work at the construction site of the intersection of subway lines 1 and 2 in Changchun, capital of northeast China's Jilin Province, April 29, 2015. Changchun's 18.5-kilometer north-to-south subway line 1 is expected to be put into use in 2016. And the 22.8-kilometer line 2 is an east-to-west passage with 19 stations, 13 of which are under construction. (Xinhua/Xu Chang)
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