If true, this is an interesting development. I always thought that it would be more likely to see a successor to the 903A, likely around the 30-35K ton range, rather than seeing a 901 successor, given there's really only one other class of supply ships in the world that compare to it (Supply-class). Could hint that China intends to form larger CSGs in the coming years for longer distance and duration missions given the lack of overseas bases? Even if it's still relatively close to him.
A successor to both the 903/A and the 901 classes seems reasonable, and a 901 successor/evolution should have always been on the cards, in fact I'm surprised it's taken this long.
Something 901 sized or larger (i.e.: Supply class size or larger) would be expected as more of a CSG oriented AOE.
903/As or something larger in the 30,000t category would be suitable for SAGs, ESGs, and augmenting AOEs in a CSG.
(acronym overload)
Given that the 903/A-class AORs date back to the early-2000s with the first two hulls, I would agree that it's time for the 903/A AOR to have its own successor class of AOEs/AORs, similar to how this unknown large AOE at Guangzhou is to the 901 AOE twins.
Full-load displacement of around 30000 tons, i.e., roughly about the same size as the Jacques Chevallier-class AOE/AOR of the French Navy should do. Not too big a displacement increase should still enable Chinese shipyards to rapidly construct these ships, similar to how the current batch 903As are being constructed and put into active service with the PLAN (at least 5 hulls since 2023).
These medium-sized AOE/AORs would be crucial to support the PLAN's ever-expanding surface combatant fleets (in SAGs) and amphibious assault fleets (in ESGs) for operations across the oceans farther from home, considering that newer warships are getting larger and having greater demands for better seakeeping and longer endurance capabilities.