It´s not the age of the ships that PLAN find problematic but the fact that many ships are outdated.The 056A FFL differs from the 056 FFL being that she is an upgrade step-up from its predecessor in the domain of ASW.
Besides, the oldest 056A is not even 10 years old, while the newest 056A entered active PLAN service just 3 years ago. Hence there is neither the reason to retire nor transfer them to the CCG.
However, given by Yankee's notion that the 054A FFGs will be slated to join the 056As in the PLAN's offshore/green-water fleet, I do envision that they will stick within and around the vicinity of the 1IC by acting as:
1. Offshore anti-air defense batteries,
2. Support/conduct anti-submarine and anti-seabed warfare, and/or
3. Radar-&-sensor pickets + intelligence gathering.
Meanwhile, 054B FFGs will join the 052C/D DDGs, 055 DDGs and CVs by operating as ASW-cum-AAW escorts for PLAN CBGs and SAGs in the "true blue" WestPac.
Though, until the 054Bs are entering PLAN service en masse, we should still see 054As sailing in the "true blue" WestPac for quite some time.
PLAN frigate fleet
- 054A (2005-2023) - 40 ships
- 054 (2005-2005) - 2 ships
- 053H3 (1999-2005) - 7 ships
- 053H1G (1993-1994) - 2 ships
- 053H1 (1985) - 1 ship (training ship)
The 054 and 054H3 are fit for China Coast Guard. The 053H1G and 053H1 are not fit for anything including training. China has moved so fast in terms of ships technology the last 30 years that Chinese ships become outdated in a few years. The 054A is the first Chinese frigate that is on par with some Western European frigates. The Type 054B frigate will be up there with more or less all Western frigates in operation today. The "catching up" game in terms of rated ships is over. Today, it´s all replacing outdated vessels that were built during the "catch up era" with modern vessels. PLAN has still an large amount of ships and vessels that were built less than ten years ago but are outdated compared to Western ships built in the 1980s. China is burden by speed and excellence in this regard. The United States actually pointed this out in a rare act of friendship. China should have built fewer rated ships and then expanded when it catched up to the West.
Anyway, building 12 ships of Type 054B to replace the 054, 054H3, 054H1G and 053H1 should not be excessively expensive or take to much time. The same goes with the replacement of 037 Corvette class. They should be replaced with something like a Cape Class patrol boat or something similar. What will be expensive for China is to replace the non-ASEA destroyers and other major vessels.