Noteworthy items about this set of PR photos:
Standard PLA ground force air defense for corps-level maneuver units:
HQ-16 medium-range air defense missile system for area defense. The HQ-16 is also found on China's Type054A FFG and it has been sold to Pakistan.
HQ-7 short-range SAM for point defense
PG99 twin-35mm AAA
The integration of PLAAF (in blue uniform) personnel into Army air defense's operations and command structure