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Tourists walk on the sea ice in Dalian, northeast China's Liaoning Province, Jan. 6, 2018. Sea ice was formed here due to the continuous low temperature. (Xinhua/Lyv Wenzheng)

Tourists walk on the sea ice in Dalian, northeast China's Liaoning Province, Jan. 6, 2018. Sea ice was formed here due to the continuous low temperature. (Xinhua/Lyv Wenzheng)