
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)
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)