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Tourists visit the snow-covered Crescent spring and Mingsha Mountain (Singing Sand Dune) scenic site in Dunhuang, northwest China's Gansu Province, Jan. 21, 2018. (Xinhua/Zhang Xiaoliang)
Tourists visit the snow-covered Crescent spring and Mingsha Mountain (Singing Sand Dune) scenic site in Dunhuang, northwest China's Gansu Province, Jan. 21, 2018. (Xinhua/Zhang Xiaoliang)