4th China Int'l Helicopter Expo opens in Tianjin

Yang Bo, a member of China's Fenglei aerobatic team, prepares for a performance at the opening ceremony of the 4th China International Helicopter Expo in Tianjin, north China, on Sept. 14, 2017. The expo kicked off here on Thursday. (Xinhua/Zhang Yongjin)

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Source:Xinhuanet
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