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
Photo taken on Jan. 7, 2020 shows the frozen waterfall at the cliff painting scenic spot of Helan Mountain in Yinchuan, northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)
Photo taken on Jan. 7, 2020 shows the frozen waterfall at the cliff painting scenic spot of Helan Mountain in Yinchuan, northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)