Ah, completely missed this post. Anyway, we don't really know if those J8F were retired or simply handed over to another unit. We had similar examples before, where a J16 would go to a J10A unit, and then those J10As would go to some J7II unit which would then retire its J7s.
J8Fs are probably 15 years old on the average. If PLAAF is expanding its numbers those may be retained for some more years.
I am more interested in those J-8B, allegedly in 12th division, 35th regiment. Are those STILL in active service after all these years? IF yes, would not those be the prime candidate J8 to be retired or replaced? Certainly a better fit than J8F.
Agreed ... but at least - and you know my obsession for numbers - we have one J-11B in 109th serials.
As for those 35th AR J-8Bs, they are long gone AFAIK. At least there was never a 35th Brigade.