Bao Weicheng, a soldier from Yancheng border protection troop in Jiangsu Province, plays with some red-crowned cranes in the Yancheng National Wetland Nature Reserve, Dec 11, 2013. The wetland attracts thousands of migratory birds that come for winter every year and has witnessed friendships develop between the birds and their guardians during the past 30 years. [Photo by Zhang Shanyu/Asianewsphoto]
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