They might do that, but we have seen the PLAAF use dedicated target drones as well. Plus pictures of cut up J-6s and J-7s to the scrapyard don't seem to suggest that the PLAAF is turning old planes into drones in a large scale.
Twin seater J-5s and J-6s are still retained in the PLAAF as flight trainers.
Twin seater J-5s and J-6s are still retained in the PLAAF as flight trainers.