Photo taken with a mobile phone shows the sea of clouds on the Tianzi Mountain at the Wulingyuan scenic area in Zhangjiajie City, central China's Hunan Province, March 14, 2018. (Xinhua/Wu Yongbing)
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Photo taken with a mobile phone shows the sea of clouds on the Tianzi Mountain at the Wulingyuan scenic area in Zhangjiajie City, central China's Hunan Province, March 14, 2018. (Xinhua/Wu Yongbing)
