Drones spray agricultural chemicals containing both pesticide and fertilizer for rape blossoms in the fields in Dongbaihu Township of Zhuji City, east China's Zhejiang Province, March 7, 2017. (Xinhua/Xu Dewen)
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Drones spray agricultural chemicals containing both pesticide and fertilizer for rape blossoms in the fields in Dongbaihu Township of Zhuji City, east China's Zhejiang Province, March 7, 2017. (Xinhua/Xu Dewen)
