A soldier from Yancheng border detachment plays with a red-crowned crane which comes here to overwinter at national nature reserve of rare birds in Yancheng, east China's Jiangsu Province, Dec. 11, 2012. The reserve was set to protect rare birds such as red-crowned cranes since 1980s. Over the past 30 years, soldiers here have been protecting the rare birds and wetlands. (Xinhua/Zhang Shanyu)