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Aerial photo taken on Aug. 16, 2020 shows the Tuotuo River, a source of the Yangtze River, in northwest China's Qinghai Province. (Xinhua/Wu Gang)
Aerial photo taken on Aug. 16, 2020 shows the Tuotuo River, a source of the Yangtze River, in northwest China's Qinghai Province. (Xinhua/Wu Gang)