Drones used to monitor traffic during May Day holiday in S China

Updated: 2016-05-03 08:51

(Xinhua)

Drones used to monitor traffic during May Day holiday in S China

A drone patrols above a high way in Guangzhou, South China's Guangdong province, May 2, 2016. The traffic police used drones to help them patrol during the three-day May Day holiday.[Photo/Xinhua]

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