I saw 054A pic, 1st and 2nd ship are different, these two older 054A(#525,#526) epuiped with HQ-7 missile, and the hull is different.
sources from internet that China total has 3 of 054A just left shipyard into water from oct,last year, the 4th 054A still in ship yard, from the photo the hull almost done, and the 5th 054A just started to build. plus #525,#526,suppose to be 5 of 054A already into water?
from the latest photos that show new vision of 054A, the hull is improved, and VSL installed at frond of the ship.
this is the photo shows VSL: