I believe it probably is.so what I remember reading is that there will be more involved exercises later this year. Although it would be hard to believe that they can carry 24 J-15s. The image with the 4 J-15s might be from this most recent exercise.
I do expect that they will conduct more exercises later this year too...and hopefully with six or eight J-15s deployed.
We shall see.
I do believe that the Liaoning is capable of handling an air wing of 24 J-15s. They would certainly not all be in the hanger at once. But US carriers cannot put a full load of aircraft in their hangers at once either...and yet they used to regularly sail with more aircraft aboard as a part of their typical air wing than what could fit into the hanger.