I don't see why PLAN needs more new frigates right now or for the next 10 years.
By 2015 PLAN will have operational 2 054 + 16 054A + 2 054A (building right now at HD)
Total 20 frigates. Enough for 5 squadrons of 4 ships each for each Destroyer Flotilla (DF) except for the 10th DF at Lushun which might be used for litoral defence and/or training purposes only. In that case, a few or all of the 053H3 for the 10th will be sufficient.
I think it would be more wise to concentrate on building more destroyers (heavy frigates really) like 052D or even E, to replace all the older generation destroyers of the 5 first line flotillas.
Actually, I think there will be a total of 20 Type 054A FFGs. As of April 28, 2013, the 17th had been launched, two more are building, and I believe there is at least one more planned.
So that will be 2 Type 054s + 20 Type 054As = 22 modern FFGs.
These Type 054A FFGs are better than the LUDA class DDGs, and most believe there is going to be a follow-on class of Type 054B FFGs...probably 14-18 of them coming online in the 2020s. That would make a total of 36 modern FFGs in the 2020s.
I expect the PLAN will move forward with the four Sov DDGs, the two Type 052B DDGs, the two Type 051C DDGs, the six Type 052C DDGs, and then add another eight Type 052D DDGs (if not more) coming online in the 2020s. That will be a total of 22-26 modern DDGs in the 2020s.
A very impressive total number...and this does not include what will probably amount to at least forty Type 053 OPVs which will be replacing so many older FFGs in service.
So, if you include the Type 053s, that means in the 2020s we are going to see 100 modern major surface combatants in the PLAN (not including carriers, LPDs, LSTs, replenishment ships, and other logistical or amphibious vessels).
In the 2020s I expect the PLAN will have 6-8 SSBNs and probably 12 SSNs of the Type 093 and Type 095 variety...and simply a whole bunch of SSKs (Song, Kilo, Yuan - maybe 12 of each of those too, or 36 total).
That will be an impressive, and very capable modern fleet.