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E-mail Xinhua, July 28, 2020
Aerial photo taken on July 26, 2020 shows hot air balloons flying over Zhangye Geopark in Zhangye, northwest China's Gansu Province. The geological park was approved as a Global Geopark by the Executive Board of the United Nations Educational, Scientific and Cultural Organization (UNESCO) at its 209th session on July 7, 2020. (Xinhua/Fan Peishen)
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