For PLAN's sake, I hope it does mean just that. They might, however, have more Type 726 following the four Zubr's. And we do not know which numbers the Huangpu-built Zubr's will have, that might change the picture again.
Well, given the way they are churning out the Type 056 vessels, and they way they have churned out the Type 054A vessels, not to mention the later Type 052C and now the Type 052D, it is clear that they could build enough Type 726 LCACs for their Three Type 071 LPDs in very quick order if they wanted to.
The question is...why have they not done so? Why have they no wanted to?
I can only think of a couple of reasons.
1) There are issues with the design and they are not comfortable with it. However, there has now been more than enough time pass, if this is the case, for them to fix such issues and produce ones they are comfortable with.
2) They have decided that having 3-4 LCACs per LPD is not what they want to do. Perhaps they intend to only have one for each LPD. Who knows? But they clearly built the Type 071 to accommodate four, so I have to believe that they put a lot of thought into that decision and would not change it easily.
Who knows? As with all things, we can but wait and allow time to tell us what will transpire.