Just look at the post above! This is the very first serial J-10 and it is still active ... as such - and in mind of still many J-7s in service for much longer - I rate is pure nonsense, that the PLAAF will retire them.
Selling to NK may be an option indeed, but otherwise they are surely still better in any way than any J-7 and will soldier on for many years to come even in second grade units.