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Farmers cover straw curtains for a greenhouse to protect vegetables against the cold in Xuxiang Village of Lianyungang City, east China's Jiangsu Province, Dec. 7, 2017. (Xinhua/Wu Chenguang)
Farmers cover straw curtains for a greenhouse to protect vegetables against the cold in Xuxiang Village of Lianyungang City, east China's Jiangsu Province, Dec. 7, 2017. (Xinhua/Wu Chenguang)