Candidates of the national college entrance exam review lessons on a special train which will take them to exam site in Alihe Township from Dayangshu Township of Oroqen Autonomous Banner, north China's Inner Mongolia Autonomous Region, June 5, 2017. Over 600 students took the special train to attend this year's national college entrance examination, known as the Gaokao, due to kick off on June 7. (Xinhua/Wang Song)
