A working staff shows crayfish raised in paddy field in Dongting Lake area of Nanxian County, central China's Hunan Province, June 7, 2017. (Xinhua/Li Ga)
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A working staff shows crayfish raised in paddy field in Dongting Lake area of Nanxian County, central China's Hunan Province, June 7, 2017. (Xinhua/Li Ga)