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Aerial photo taken on May 22, 2018 shows a tractor weeding at a grape planting base in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)
Aerial photo taken on May 22, 2018 shows a tractor weeding at a grape planting base in Yinchuan, capital of northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)