Is it known if HQ-22 (the upgraded HQ-12 which is basically the KS-1 series from the 1990s) is a single stage or multi stage missile? Online range figures suggest around 170km effective range which is more than half of the HQ-9A/B. The new missile is thinner but longer than the old KS-1 it's based on and the new range doesn't surprise me.
Is it a two staged missile like the HQ-9?
Serbia bought the export variant of the HQ-22 last year. Makes sense since they don't need the really long ranges given the geography and have Pantsir, Buks, and Kubs for shorter ranges.
At first I was going to say that it is probably an ATGM but then spotted the radar. It also looks a bit more like an HQ-7 canister than an HJ-10's. Whatever it is, it's a short range missile around the size of the HQ-7. Most likely an HQ-7 just mounted on a different vehicle with an upgraded radar.
Doubt it's a Pantsir copy. PLA doesn't operate any Pantsirs and have not bought any. So if anything it's another short range air defence system. You can't copy what potentially makes a system more effective without owning it, operating it, and understanding it. I don't think the Pantsir is special in any way. The equipment isn't infallible, the missiles are groundbreaking but they are certainly better than what everyone else has for short ranges (two staged and probably more optimised performance). It's just a good modern gun + missiles combo all mobile unit complete with all the sensors required to perform AD.
PL-10 SAM is way too antiquated and a crappy missile even by past standards. HQ-7 is decent but a modernised short range AD that could serve in a similar role as Pantsir does, would probably need to be based off more modern missiles. There is the ground based PL-12 and extended range missile. There's the "new" triple 5 missile for the navy but all of those are more mid range and bulkier. I can see an HQ-7 replacement be based on a new missile. Possibly one that is two staged and cheap enough to manufacture in numbers like Pantsir's. That's the only part I suppose would be following Pantsir.