Nah, that couldn't possibly be a PL-4 missile. Look at its wing, it carries PL-8. PL-8 entered production in 1988, while PL-4 was cancelled back in 1984. That missile is a PL-11.
So, let's see:
PL-11 entered service in 1992;
PL-8 entered service in 1986;
J-8B (the patch that started to use Doppler pulse radar and is capable of supporting BVR missiles)entered service in 1995.
J-8D entered service a year later in 1996.
J-8H entered service in 1997.
J-8F entered service in the early 2000s.
So, it can be B or D. It must be some kind of upgrade package that was introduced.