HQ-9 only has a range of 120Km which makes it middle range SAM.
You'll need over 200Km in range like SM-6 to label it as a Long range SAM.
Well, FD-2000 as a range of 120km -- none of us really know what the range of HQ-9, HHQ-9 or newer variants of them have. There is also the widely circulated alternative slant range that HQ-9 actually has a range of 200km, but I personally doubt that is true, at least for the initial variant.
That said, Aster-30 has a range of 120km as well and is also widely considered to be a long range SAM. I personally consider any SAM with an effective slant range exceeding 70km to be in the long range SAM category.
Medium range SAMs would be like Sea Ceptor, ESSM, HQ-16, Shtil, whose effective range varies from 20+km to under 70km.
I also wouldn't take range numbers for SAMs (or AAMs) too seriously -- the effective range always differs depending on what kind of target is being faced, and the various manufacturers in the world are probably not using any universal, common target parameters for their effective range measures.