Interesting to note, that there are two anonymous missiles in the Naval display, although even the brand new DF-21 and DF-26 were already labeled with numerals. I guess these two may be naval version of YJ-12 and the SM-3 equivalent HHQ-26.
Interesting comparison of the YJ-83 and YJ-12 I received via email.
The YJ-12 is a very large missile...looks to be, according to my friend's estimate, about 7 meters long (without the booster) and 0.50 meters in diameter.