Arctic wolves pace at Harbin Polarland in Harbin, capital of northeast China's Heilongjiang Province, Nov. 22, 2017. Five arctic wolves from Serbia were introduced into the zoological park on Wednesday. (Xinhua/Wang Jianwei)
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Arctic wolves pace at Harbin Polarland in Harbin, capital of northeast China's Heilongjiang Province, Nov. 22, 2017. Five arctic wolves from Serbia were introduced into the zoological park on Wednesday. (Xinhua/Wang Jianwei)
