Photo taken on Dec. 16, 2020 shows the view of the Yellow River in Guide County of the Tibetan Autonomous Prefecture of Hainan, northwest China's Qinghai Province. (Xinhua/Wu Gang)

Photo taken on Dec. 16, 2020 shows the view of the Yellow River in Guide County of the Tibetan Autonomous Prefecture of Hainan, northwest China's Qinghai Province. (Xinhua/Wu Gang)

Photo taken on Dec. 16, 2020 shows the view of the Yellow River in Guide County of the Tibetan Autonomous Prefecture of Hainan, northwest China's Qinghai Province. (Xinhua/Wu Gang)

Photo taken on Dec. 16, 2020 shows the view of the Yellow River in Guide County of the Tibetan Autonomous Prefecture of Hainan, northwest China's Qinghai Province. (Xinhua/Wu Gang)

Photo taken on Dec. 16, 2020 shows the view of the Yellow River in Guide County of the Tibetan Autonomous Prefecture of Hainan, northwest China's Qinghai Province. (Xinhua/Wu Gang)

Photo taken on Dec. 16, 2020 shows the view of the Yellow River in Guide County of the Tibetan Autonomous Prefecture of Hainan, northwest China's Qinghai Province. (Xinhua/Wu Gang)

Photo taken on Dec. 16, 2020 shows the view of the Yellow River in Guide County of the Tibetan Autonomous Prefecture of Hainan, northwest China's Qinghai Province. (Xinhua/Wu Gang)