112 got upgraded several times. In 2002 and 2003 it got a series of updates, mainly focusing on weapons. Starting from 2011, it got a major overhaul that took about two years. Most sensors were changed. But I don't think they swapped the engines. Actually, I don't think PLAN ever did that to any warships. You would have to cut many structures up. It would be very costly and not very possible for PLAN to finish it with other updates altogether in just two years.Indeed. That's why I suspect they had been changed already. Besides, what happens in the JV GE has with Shenyang Liming will have to be reported back to the US, and the PLAN is not going to have that.