Are these new batch 054As equipped with YJ-12s?
It would completely befuddle me if they're still equipping them with YJ-83s. The 12 is such a massive capability advantage. They need to retrofit the older ships with the 12 as well.
We need to be sure and only until the ships are seen equipped with them. But I won't be surprised if YJ-83s are still used.
There are two reasons and both align with the frigate's mission.
The first is that the YJ-83 is not the same YJ-83 any longer. We are aware of a new version called the YJ-83B. This variant now has a infrared imaging seeker, with a black face on a canted nose. The point with using this seeker is that now, it no longer uses radar as a guidance system. It locks on to the target based on its pixelated image. With no radar emissions, the missile gives no radar threat warning of its approach, and it cannot be jammed using electronic warfare. Your best bet would be to use chaff and flares, and shoot down the missile directly. The second point of this seeker, which is important, is that it can be used against land targets, such as islands with antiship missile batteries in them. The third point of this seeker, is that it can lock onto opposing littoral combat vessels such as FACs as radar guidance can have issues against littoral environments due to the sea bed, rocks and islands.
The second point of retaining the YJ-83 launchers is the use of the YU-11 ASROC. Although this makes more sense on the Type 056A, since the Type 054A can equip the YU-8 ASROC on the VLS.