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A worker checks the growing condition of rice with a drone at the Sanhe farm in Xingde Village of Huinan County, northeast China's Jilin Province, July 6, 2016. (Xinhua/Zhang Nan)

A worker checks the growing condition of rice with a drone at the Sanhe farm in Xingde Village of Huinan County, northeast China's Jilin Province, July 6, 2016. (Xinhua/Zhang Nan)