Well, I am afraid this is pretty much self contradictory:
"China’s second carrier will be based on the Liaoning and will be among the world’s most advanced"
The Liaoning is a 30 year old design. Any STOBAR designed based on it, despite improving its sensors and some other areas, will not be among the world's most advanced carriers.
That will not happen until the get a nice, advanced CATOBAR carrier out there.
Do not get me wrong. The Liaoning is a powerful tool and has some great capabilities and decent airwing.
but until the add strong AEW aircraft, and get a 5th gen strike/fighter aboard her, and then increase her sortee rate and her night time fighting capabilities...even as good a tool as she is is not among the most advanced.
Right now, that is reserved for the US, France, and now the RN with their new carriers.
The RN carrier will have a 5th gen strike/fighter. Although I honestly believe its helo borne AEW will be better than the Chinese...it itself is still not up to par with the fixed wing E-2C/D AEW that the US and French utilize.
Anyhow...there is no doubt in my mind that these two carriers are good vessels and are bringing the PLAN a much better capability than they have ever had in terms of naval air. But I also believe they will be the last STOBAR carriers the Chinese ever build and that their next carriers will step up to be more advanced and capable.
I don't think it's that contradictory, because it really also comes down to what we consider to mean as "advanced".
Because when one says "advanced" I think we automatically think of "capability" but the two are not always necessarily the same.
For example, if an 056 class corvette or an LCS today teleported back to World War II, I think it could quite comfortably be called the most "advanced" warship in the world.
However it would be far from the most capable, or the largest, when compared to other ships that exist and the kind of weapons they fielded at the time, such as large cannons aboard battleships...
But what this example is meant to demonstrate is that it is the advancement of the ship's subsystems which is what we should look at when considering how advanced a ship class may be to one another, rather than its "capability" which is a function of a whole host of other factors.
A ship can be more advanced than another but still far less capable, and vice versa.
Similarly, for 001A, I think even though it is based on an old hull design and is using STOBAR as its launch method, I expect other major subsystems such as combat management, command and control, and radar systems to be very advanced.
In other words, the summation of 001A's subsystems and the current level of fleetwide and crew aircraft carrier expertise will not make it among the most capable aircraft carrier hulls in the world... however I think a case can definitely be made that a good portion of its subsystems will be among the world's most advanced.
So I don't think there's anything wrong with the statement, but it does mean people might misinterpret the phrase "among the most advanced" to mean "among the most capable," which is what you seem to have done, and it is an easy mistake to make.
edit: that is not to say 001A may not one day also become among the "most capable" carriers in the world. Depending on what the future airwing looks like and once the navy becomes acquainted with operating a carrier from the strategic doctrine level down to the nuts and bolts crew level, there is not much stopping it from being one of the most capable carriers in the world.
Even the lack of a fixed wing AEW&C isn't exactly a deal breaker, as it really also depends on the capability of Z-18JY and the future surveillance/datalinking capability of the fighter complement as well... in some ways this factor is not dissimilar to what the UK's CVF carriers face with their AW101 Crowsnest helicopter AEW&C and F-35Bs.