NRIET skipped the entire PESA cycle entirely, just like they did on the Type 052C. You will have a hard time finding any parallel feed PESA in the entire PLA. This kind of PESA connects the main and central power amplifier and transmitter, with hundreds, or thousands of lines to each element, and so it is actually very difficult and time consuming to produce, not to mention requires a high level of tolerance and quality, with each line must have a very exact length across well over a thousand elements. The kind of PESA you see in service with SAMs, are different animals, ranging from optical feed PESA, where the transmitter feed projects the signal to the back of the array through an optical lens, or the frequency scan planar array, where you have a serial line feed at the side. Compared to the complexity of using a parallel line PESA, an AESA is much simpler. Mind you, there are four different kinds of PESA based on their feed systems, the PLA as a whole only placed into service two of them while the Russians did all four.
People think that you have to develop a PESA first before going to AESA is the ground for this myth, when you can choose to leapfrog it.
Hongdu JL-10 likely uses slotted array. I don't see why a trainer would go through the expense and complexity of using a parallel line feed PESA.
Can you give TL;DR for explanations like this? Because I think we really need those.
@Tam did say JL-10/L-15B uses PESA. The article you linked didn't mention what kind of PESA.