I have no direct way of confirming this but I do know some folk that work at Kamra (Pakistan aeronautical complex) and from they say (multiple people) is that alot of new equipment and stuff started coming in around end of march till april, PAF Airchief also went to visit China in April.
This is some interesting news, Kamra is the main base for integration of new weapon systems so stuff coming direct to Kamra is a big deal. The timing however suggests that it could be some of the rumored EW stuff or the full range PL-15s that came to Kamra. Probably the first stop for associated equipment for J-35 is going to be Kamra as well. As of now, I think there's a lot of indications from a few different official sources that J-35 is coming, a better question would then be when is it coming.
According to them, 8 new planes (they dont know which planes tho) came at PAF Qadri
If that's the case then maybe the new planes they were referring to might be the rumored EW planes and they landed at Qadri instead of Kamra. It'd make sense to fly them from there as it's fairly close to China but I'm not sure Qadri has the infrastructure to host planes for too long. Even PAF uses it mostly as a forward airstrip AFAIK and I'd doubt if there's even a regular flight of jets based there.