About 052D air-defence missile, we don't know yet but i believe China official media will show the truth.
Chinese information provide now PLAN's air-defence missile:
HQ-9 (installed on 052C DDG) fire range 6km~200km, HQ-9 missile is the base of CNMD(Chinese National Missile Defence)
HQ-16 (installed on 054A FFG) fire range 1.5km~40km
HQ-10 (FL-3000, installed on 056 corvette 052D DDG and CV16) fire range 1km~10km
DK-10A of China Navy's ESSM belong to medium range anti-aircraft missile.
If future DK-10A really reach 50km fire range and small to 4x installed in one VLS. It's much better than current HQ-16 used by PLAN, it means PLAN FFG or DDG can carry more 50km air-defence missiles, not only 32x HQ-16 will be 128x DK-10A or 32x DK-10A and others like VLS launched anti-ship missile,anti-sub rocket,cruise missile.