Operational J-15s loaded onto China Navy's Liaoning aircraft carrier

The People's Liberation Army has begun loading operational J-15 carrier-based fighter jets onto the Liaoning, China's first and only aircraft carrier.
Recently leaked photos reveal that four J-15s have been moved onto the Liaoning, which will eventually be able to carry up to 24 fighter jets of similar size.
Unconfirmed reports state that the Liaoning conducted its first naval drills for 2015 between April 10 and April 18 in northeast China's Bohai Bay.
Though there is currently no confirmed publicly information about the specifications of the J-15, reports suggest that the fighter is based on the Su-33.
wantchinatimes

China’s Carrier-Based J-15 Likely Enters Mass Production

A number of recent reports in Chinese state-run media indicate that the country’s carrier-based J-15 multirole fighter jets have entered mass production.
The Shenyang J-15 (also called Flying Shark) is China’s carrier-based fighter aircraft. It was reversed engineered from a Russian Sukhoi Su-33 that China acquired from Ukraine, although it reportedly is equipped with some indigenous weapons, avionics and other features that Beijing claims greatly enhances its capabilities. The J-15 is also powered by the Chinese-built Taihang (WS-10) turbofan engine.
A J-15 prototype conducted its first flight test in August 2009. In November last year it was announced that a PLA Air Force (PLAAF) pilot conducted the first take-off and landing from China’s aircraft carrier, Liaoning, using one of the J-15 tester jets. Throughout 2013 the PLAAF has continued holding take-off and landing exercises using the J-15 aircraft.
thediplomat

First flight of Shenyang J-15S twin-seat carrier-borne fighter

Shenyang’s new J-15S tandem seat carrier-borne fighter made its maiden flight . The aircraft flew four orbits around the airfield solo before landing at 1006.