Re: PLAN submarines Thread II
The PLAN is doing what the PLA has always done - make a compromise between what they want and what they could build.
For the PLAN to invest in such a large new ocean going SSK would indeed suggest a lack of confidence in the performance of its existing SSN design.
The new sub would likely form part of the escort package of any new PLAN carriers, so I would expected it to go to the Southern fleet.
If that is the case, then it would also indicate that the first gen of Chinese indigenous carriers will be conventionally powered, thus the use of SSKs would be less of a drag on the overall performance of any carrier battle group.
The PLAN will build a couple of each new successive generation of SSNs as test ships (much like they have done with their surface fleet) until they have reach a point where the performance of a particular class is deemed to be acceptable, at which point the PLAN will probably start mass production (as was the case with the 054A, Song/Yuan, 022 etc).
Whether this is a stopgap measure to fill the operational need of the Varyag or an indication of a lack of confidence in the PLAN regarding Chinese SSNs will probably only be answered based on how many and how fast these new SSKs are built.
If we see large numbers being built quickly, then that would probably indicated that the PLAN does not expect to be able to field a world-class SSN for at least the next decade.
If only a pair or so of the new sub is built, then it would be more likely that these are concept test beds that are also required to meet the operational requirements of the Varyag.