Visitors look at models of Boeing aircrafts at the Aviation Expo China 2015, in Beijing, China, September 16, 2015. Boeing Co said on September 23, 2015 it had won orders and commitments from China for 250 narrowbody 737 aircraft and 50 widebody aircraft, valued at about $38 billion at list prices. Boeing also was due to announce later in the day an agreement to build a 737 completion center in China that would finish and deliver 737s built at Boeing's factory in Renton, Washington. Picture taken on September 16, 2015. REUTERS/Jason Lee