Final competition of CGAIEC kicks off in Qingdao

A competitor explains the technical principles supporting his entry during the final competition of the 2019 China General Aviation Innovation and Entrepreneurship Competition (CGAIEC) in Qingdao, east China's Shandong Province, Nov. 22, 2019. The final competition of CGAIEC kicked off here on Friday. (Xinhua/Li Ziheng)