This undated photo shows Duan Qihang at home in Changsha. Duan Qihang is a seven-year-old boy studying in the second-grade of the 2nd Primary School attached to the University of Defence Science and Technology in Changsha, cental China's Hunan Province. Duan Qihang enjoys most his happy life in the countryside home of his father playing with frogs.(Xinhua/Li Ga)
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