???
We can see a large square panel which is almost certainly for an opening for towed VDS (which we've seen on later 054As, and all 052Ds and 055s).
And there are multiple smaller openings any of which could be for a towed linear sonar.
View attachment 117786
So I think we can safely say it does definitely have a towed VDS and almost certainly has a towed linear sonar.
Basically all new build surface combatants for the PLAN from the early/mid 2000s from 1500t 056As to 13,000t 055s (i.e. 054As and 052Ds as well) have both towed VDS and towed linear sonar, so it would be frankly bizarre if 054B lacked them.