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Aerial photo taken on June 22, 2019 shows the scenery of Qilian Mountains in Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Wu Gang)
Aerial photo taken on June 22, 2019 shows the scenery of Qilian Mountains in Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Wu Gang)