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Tourists watch a rainbow over the Hukou waterfall of the Yellow River in Jixian, north China's Shanxi Province, Oct. 27, 2017. (Xinhua/Lyu Guiming)
Tourists watch a rainbow over the Hukou waterfall of the Yellow River in Jixian, north China's Shanxi Province, Oct. 27, 2017. (Xinhua/Lyu Guiming)