AVIC I was historically focused on large planes such as bombers (Xian H-6, Xian JH-7), medium commercial planes (ARJ21), or fighter planes (J-7, J-8, J-10, J-11, and JF-17), while AVIC II was focused on smaller planes and helicopters.
With more than 5,600 engines in service (as of 2012), the CF34 is used on a number of jet airliners, including the Bombardier CRJ series, the Embraer E-Jets, and the Chinese ARJ21 under development.