【香港今期红姐统一主图库_香港今期红姐统一主图库官网】Drone World Congress 2019 kicks off in China's Guangdong

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People visit the 4th Shenzhen International UAV Expo in south China's Guangdong Province, June 20, 2019. The Drone World Congress 2019 and the 4th Shenzhen International UAV Expo opened here on Thursday. Over 100 enterprises will show more than 1,000 drones at the event. (Xinhua/Wang Feng)

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