![Jia Mingyou (R) measures wind speed before controlling an air vehicle to take aerial photos in Changchun, Northeast China's Jilin province, May 3, 2013. [Photo/Xinhua]](U472P886T1D61862F12DT20130504114424.jpg "Jia Mingyou (R) measures wind speed before controlling an air vehicle to take aerial photos in Changchun, Northeast China's Jilin province, May 3, 2013. [Photo/Xinhua]")
Jia Mingyou (R) measures wind speed before controlling an air vehicle to take aerial photos in Changchun, Northeast China's Jilin province, May 3, 2013. [Photo/Xinhua]
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