Lu Gang (R) and Lu Yan, twin photographers from Beijing, pose for photo during the 9th 皇冠体育app International Aviation and Aerospace Exhibition in Zhuhai, south 皇冠体育app's Guangdong province, Nov. 12, 2012. The exhibition has attracted a large number of photograghers. Some of them are from media, some are from aviation industry corporations and others are big fans of aviation. [Photo/Xinhua]
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