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Tourists view the Danxia landform in Guide County, northwest China's Qinghai Province, July 26, 2019. Danxia landform is a unique type of landscapes formed from red sandstone and characterized by steep cliffs. (Xinhua/Zou Yu)

Tourists view the Danxia landform in Guide County, northwest China's Qinghai Province, July 26, 2019. Danxia landform is a unique type of landscapes formed from red sandstone and characterized by steep cliffs. (Xinhua/Zou Yu)