A staff member walks across an apron, where business airplanes to be displayed at the 2014 Asian Business Aviation Conference & Exhibition (ABACE2014) are parked, at Hongqiao International Airport in east China`s Shanghai, April 14, 2014. ABACE2014, Asia`s largest business aviation product and services event, will be held in Shanghai from April 15 to 17. Twenty business airplane manufacturers, including Boeing, Airbus and Bombardier, will take part in the event. (Xinhua/Yang Guang)

　　Workers clean an airplane prior to the Asian Business Aviation Conference and Exhibition (ABACE) in Shanghai, east China, April 14, 2014. A total of 20 exhibitors, including Boeing and Airbus, will take part in the ABACE 2014 from April 15 to 17 in the city. (Xinhua/Chen Fei)

　　Workers clean an airplane prior to the Asian Business Aviation Conference and Exhibition (ABACE) in Shanghai, east China, April 14, 2014. A total of 20 exhibitors, including Boeing and Airbus, will take part in the ABACE 2014 from April 15 to 17 in the city. (Xinhua/Chen Fei)