
Citizens ride subway train in Changchun, capital of northeast China's Jilin Province, June 30, 2017. Subway line one in Changchun started operation on Friday. (Xinhua/Lin Hong)

Citizens ride subway train in Changchun, capital of northeast China's Jilin Province, June 30, 2017. Subway line one in Changchun started operation on Friday. (Xinhua/Lin Hong)