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FILE PHOTO: Workers work on a flight of Air China
FILE PHOTO: Workers work on a flight of Air China on the tarmac at the Beijing Capital International Airport in Beijing, China, March 28, 2016.REUTERS/Kim Kyung-Hoon
FILE PHOTO: Workers work on a flight of Air China on the tarmac at the Beijing Capital International Airport in Beijing, China, March 28, 2016.REUTERS/Kim Kyung-Hoon