"The Chinese J-15 clone is unlikely to achieve the same performance characteristics of the Russian Su-33 carrier-based fighter, and I do not rule out the possibility that China could return to negotiations with Russia on the purchase of a substantial batch of Su-33s," said Col. (Ret.) Igor Korotchenko, a member of the Defense Ministry's Public Council.
The colonel could only point out structural and engine problems as problems, but the report mentions that the J-15 prototype is already using WS-10 engines.Korotchenko said China was unlikely to solve technical problems related to the design of the folding wings and to develop a reliable engine for the aircraft, although the first J-15 prototype reportedly made its maiden flight on August 31, 2009, powered by Chinese WS-10 turbofan engines.
China still has license to produce over 100 aircraft based upon Su-27 airframe from contract signed in 1996. If they decide to make some of these aircraft for carrier use then that's their business.then why dont design ur own system,why require a proven tech for improving