Stealing blueprints and other technical data so they can make their own knockoffs of western aircraft, as they have with the J-20 (F-22 knockoff) and J-31 (F-35

Stealing blueprints and other technical data so they can make their own knockoffs of western aircraft, as they have with the J-20 (F-22 knockoff) and J-31 (F-35 knockoff).