1,500 workers built a new railway section in less than nine hours in China.
원문출처 : http://www.cnn.com/videos/world/2018/01/25/speedy-china-railway-lon-orig-bk.cnn
원문출처 : http://www.cnn.com/videos/world/2018/01/25/speedy-china-railway-lon-orig-bk.cnn