Students pose for photos on their visit to a coal museum, which is located underground at the Jinhuagong National Mine Park in Datong City, north China's Shanxi Province, May 16, 2017. (Xinhua/Cao Yang)
Jinhuagong National Mine Park in north China's Shanxi
Tourists visit the underground tunnel of an abandoned colliery to learn the coal mining experiences at the Jinhuagong National Mine Park in Datong City, north China's Shanxi Province, May 16, 2017.
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