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Smart City space information platform “Yunduan” flies in Dongguan, Guangdong province, in this picture taken December 28, 2015. According to local media, the 41.8-meter-long airship-shaped aerial platform “Yunduan” was used in the rescue work in Shenzhen after the landslide on December 20. With the launch in Dongguan on Monday, “Yunduan” started to serve as a real time monitor for the city’s water system, weather and air quality, and also to contribute to regional security surveillance. (Photo by Huo Jianbin/Reuters/Southern Metropolis Daily)
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