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People visit Baotu Spring scenic spot in Jinan, capital of east China's Shandong Province, Feb. 18, 2018, the fourth day of the Spring Festival holiday. (Xinhua/Feng Jie)

People visit Baotu Spring scenic spot in Jinan, capital of east China's Shandong Province, Feb. 18, 2018, the fourth day of the Spring Festival holiday. (Xinhua/Feng Jie)