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Aerial photo taken on Aug. 7, 2019 shows the view of Gaolan Mountain in Lanzhou, capital of northwest China's Gansu Province. (Xinhua/Cui Hanchao)
Aerial photo taken on Aug. 7, 2019 shows the view of Gaolan Mountain in Lanzhou, capital of northwest China's Gansu Province. (Xinhua/Cui Hanchao)