A staff member introduces simulated flying for a viewer at the 2017 China International General Aviation Convention (CIGAC) in Xi'an, capital of northwest China's Shaanxi Province, Aug. 24, 2017. The four-day 2017 CIGAC kicked off here on Thursday, during which 60 aircraft and over 3,000 products of aviation would be displayed. (Xinhua/Shao Rui)
