I think the radars are due for an upgrade at some point since the older planar arrays have a tendency to degrade after more than a decade of use. This prompted PLAAF to switch to air-cooled AESA for J-10A.
Actually I don't know, but Batch 07 was first seen in 2017
By the way ... Some interesting images, since officially only labelled as an ETC Brigade, but at least one image reveals the serial number 70261, that confirms it as the 95th Air Brigade at Lianyungang, Baitabu AP.
Also interesting, this unit is rumoured to gain J-16 or even J-20.
Allegedly the "Liaodong Eagle" unit within the NTC has been revealed operating now J-16 ... so as it seems, the 89th Air Brigade at Pulandian is now confirmed a J-16 operator!
(Image via @太湖军I名 and @拓跋尊 from Weibo)