on 13 july 2008, in a press conference on the eve of the opening of the farnborough airshow, bombardier aerospace formally launched the cseries, with a letter of interest from lufthansa for 60 aircraft, including 30 options, at a us$46.7 million list price. the aircraft fuel efficiency would be per passenger in a dense seating. the final assembly of the aircraft would be done at mirabel, wings would be developed and manufactured at belfast and the aft fuselage and cockpit would be manufactured in saint-laurent, quebec. the fuselage was to be built by china aviation industry corporation (avic)'s affiliate shenyang aircraft corporation.