Visitors view exhibits during the ongoing 5th China Helicopter Exposition in north China's Tianjin, Oct. 10, 2019. The 5th China Helicopter Exposition runs from Oct. 10 to 13. (Xinhua/Li Ran)
5th China Helicopter Exposition opens in north China's Tianjin
Source: Xinhua| 2019-10-10 22:16:44|Editor: ZX