LJ Air or Longjiang Airlines Co.Ltd is a scheduled airline based at Harbin Taiping International Airport, Harbin, China, the airline commenced services with 2 of which member of the Airbus A320 family of short- to medium-range, narrow-body, commercial passenger twin-engine jet airliners manufactured by Airbus?
LJ Air:  The airline commenced services with 2 Airbus A321. Airbus A321: The Airbus A321 is a member of the Airbus A320 family of short- to medium-range, narrow-body, commercial passenger twin-engine jet airliners manufactured by Airbus.
Airbus A321