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Visitors look at a crop protection drone in the 25th China Yangling Agricultural Hi-Tech Fair in Yangling, northwest China's Shaanxi Province, Nov. 5, 2018. (Xinhua/Shao Rui)
Visitors look at a crop protection drone in the 25th China Yangling Agricultural Hi-Tech Fair in Yangling, northwest China's Shaanxi Province, Nov. 5, 2018. (Xinhua/Shao Rui)