China currently has two aircraft carriers, both built to a Soviet design with ski-jump ramps at the bow. Their ability to launch effective fighter sorties is limited by their lack of catapults, which are needed to push more heavily-laden aircraft up to speed and off the deck.
China's third carrier design, designated Type 003, does not have this limitation. The vessel is built with diesel-electric propulsion and (likely) electromagnetic launch catapults, skipping over first-generation steam catapult systems in favor of the latest technology developed by the U.S. Navy. This capability will enable it to support more fighter aircraft, fixed-wing airborne early warning aircraft, and higher-tempo flight operations - increasing its air wing's reach and effectiveness.