A worker cleans a business aircraft before the 2016 Asian Business Aviation Conference & Exhibition (ABACE 2016) in east China's Shanghai, April 11, 2016. The ABACE 2016 will be held from April 12 to 14 in Shanghai. (Photo: Xinhua/Chen Fei)
A worker cleans a business aircraft before the 2016 Asian Business Aviation Conference & Exhibition (ABACE 2016) in east China's Shanghai, April 11, 2016. The ABACE 2016 will be held from April 12 to 14 in Shanghai. (Photo: Xinhua/Chen Fei)
A business aircraft for the 2016 Asian Business Aviation Conference & Exhibition (ABACE 2016) stops at the Shanghai Hongqiao International Airport in east China's Shanghai, April 11, 2016. The ABACE 2016 will be held from April 12 to 14 in Shanghai. (Photo: Xinhua/Chen Fei)