Could you please post a link to that Weibo-account? ... and what's his overall credibility so far?
View attachment 109552
Here it is:
based on a discussion "looking at the guy's profile, it's clear he's just a traveler and not a military buff so not any reason i can see for faking it... strange"
Is the PLA known to hold joint military exercises with the KPA in the past?
If not (and if the location where the photograph is taken has been confirmed to be true), then perhaps the JH-7 has been transferred to the KPAAF.
Either that, or maybe the JH-7 is still owned by the PLAAF, but sent to North Korea for evaluation flights by the KPAAF.
Anyways, just my two cents.
Add on:
Also
@Deino the claim may still warrant some suspicion.