Is there some change in doctrine for the PLAN? I thought their earliest goal is to establish a blue water fleet as early as possible. Building smaller and more numerous ships also puts a strain on the PLAN manpower, and as far as I know the military is wanting to cut its size. I wouldn't be disappointed if only four or five 9000 ton ships are built but the 2018 date and the 052D specs are a bit suspicious.
... the PLAN are looking to be expanding ship number and displacement, a 7000 ton 052D will offer an excellent replacement to the masses of ludas. Besides they already have a blue water navy in most respects of the word.
And I also doubt that the PLAN would build a cruiser; such concepts are not useful in modern situations and even the US has dropped their CGX program. 10000 tons would be in my opinion the largest the PLAN is willing to go in terms of warships.
10,000 tons is the accepted weight of cruisers and for PLAN's future USN esque trajectory a substantial number of such vessels will be necessary to act as the primary shields of carriers. CGX was meant to be some 25k but never materialized, clearly PLAN won't be going there.
Regarding your comment on patrols; the Type 056 or Type 054A would be perfect for such tasks and anti-piracy patrols as well; the destroyers would be reserved for serious enemies and a 7000 ton ship won't give you much of an advantage.
056 doesn't quite have the endurance for blue water patrols, and 054A will be stopping production sometime this decade, though I expect the 059 to be the 054A of 2020+ (i.e. decently capable multirole workhorse). Even 052D is expected, with its medium-heavy displacement for DDGs. It's the 10k ton CG which shows PLAN are serious about the kind of navy they want for the twenty first century.
Even the Indian Navy is increasing tonnage via their Kolkata class destroyers.
The way I envisioned the 2020 PLAN fleet was:
- 2 aircraft carriers
- small number of 10000 ton destroyers
- medium number of 7000 ton destroyers
- 16 054A frigates
- 20 056
That's more or less what's happening going by A man's chart. We will have a small number of 058 cruisers in service by 2020 and a larger number of 052Ds in service too.