PLA Anti-Air Missile (SAM) systems

YouTube video:

Looks spacious inside!

I find it interesting that we're getting many more images of the HQ17 on the wheeled chassis, as opposed to the tracked chassis, which was the starting variant. Is that an indication that the tracked one is not really being produced in large numbers anymore?

And, regardless of the variant, is there any way to track the current numbers of the HQ17 in the PLA?

Exercise by the 79th Army Group Anti-Aircraft Brigade, which deploys jammers to counter fighter aircraft fire control radar, among other things.
Interesting ground based Jammer from Henri K blog

A cool image of the interior of a HQ-9(?) command and control vehicle.

HQ-17A being transported. Note the rarely photographed command vehicle in the second image. It's based on the same chassis as the missile vehicle.

" The LY-80 features an interception range between 3.5km to 70km and altitude of 20,000 metres"

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" The HQ-16A missile can hit targets of an altitude from 400 to 10,000 meters."

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I was searching for intel on the LY-80/HQ-16A and the available data is a bit misleading. These seemingly contradictory numbers are likely based on different flight profiles and have to account for the kinematic engagement envelope: