It seems the new batch of 054As have enlarged front windows, 5 in a row compared to 7 (old). Will be interesting to see how many more changes the new batch will make. Maybe change out the old type 364 fire control radar for the new arrayed one on 075. I doubt if the type 382 will be changed tho.
I have a feeling they are using the same windows from the 052D. This small minor detail will help streamline production.
What I find most interesting is that the mast is made of two modular parts. That makes it possible to say, replace the upper half mast with a brand new mast, let's say, that have integrated fixed phase arrays. The thing to watch out is any refit upper mast should match the weight and power usage of the old.
054A over the years have added new SATCOMs with minor refits. We should expect these SATCOMs to be installed right on the ship brand new. The 054 refit in the previous page did not show any radar upgrade, but it does have a new SATCOM.
The 054 refit appears to be using the 8x3 decoy launcher with a streamlined enclosed case from the 055, or at least from the way the protective covering is tightly wrapped around the device to suggest the shape of it. I won't be surprised if this 8x3 launcher becomes the new standard for new builds and refits, replacing the old 6x4 DLS used with the 054A.
Requisite in any refit are upgraded ESM and ECM units. To be straight, the last four 054A already had upgraded ESM and ECM units, the latter using the Type 726-3 ECM unit from the 052C/D, replacing the Type 751 ECM. The 726-3 ECM has become a standard requirement at some point, the Liaoning has it, the Shandong has it, the 051B and Sovremenny refits also have it, the 052 refits have it, and even the 053H3 refits. This points to a high level of confidence with this unit. The 054 refit also appears to be using this device from the way the covering wraps around it.
The Type 751 ESM was upgraded in the last batch of 054A with what appears to be another ESM set on top of it. The crown on top reminds of the Type 726-5 ESM used on the 056 family. The 054 refit also appears to be using this new version, and I would expect the upgraded 751 to be incorporated standard in all new builds.
The Type 364 radar, which is a PLAN favorite, might be going out for a replacement as suggested by the 075, so we take an eye on that. Its not replaced on the 054 refit however.