16,000 wintering swans in north China wetland returning to Siberia-Xinhua

16,000 wintering swans in north China wetland returning to Siberia-

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China ,Pinglu ,Fujian ,Jianxi ,Shanxi ,Wang Chao ,China Wildlife Conservation Association ,Xinhua ,Shanxi Province ,Pinglu County ,China Wildlife Conservation ,Pinglu Yellow River ,Aswan ,