If this is true then the design should revolve around 1 of 3 frigate designs offered by CSOC.
#1 and #3 seem the most plausible.
1. CSOC Multi Mission Frigate:The 1500t multimission frigate which has 2 ciws (rear could be replaced by PDMS) and 24 vls cells (and from the layout im assuming at least 8 cells are for ASHM) leaving 16 for SAM.
2. CSOC High performance Frigate: this is a 3500t ship with 8 AShM, 32 cell vls, 21 cell PDMS, 2 front CIWS and 2 anti-sub rocket systems.
3. CSOC Tiger Class: this appears to be the closest design to the news report of possible c28a based frigates. It looks nearly identical with on major difference, a 12 cell vls and the addition of a rear 21 cell pdms. If china is able to make a quad packed missile based on DK-10A, Then this design would be hugely beneficial. Additionally, KSEW has the facilities for it already given c28A is based on F-22P AND tiger class appears to be based on C-28A.