The ICBM didn't hit the missile the HQ-19 interceptor did, and no not every space capable nation can shoot down a satellite look how many decades it took the US to being able to do achieve that.
And yes I said that the system initially was deployed with a range of about 200KM but they have made improvements since:
https://en.wikipedia.org/wiki/HQ-9#Variants
Most SAM's have different profiles and interceptors that cover targets with different capabilities this quite often limits their range, you can argue about the exact range and operational ceiling for the interceptors in question all day long it still doesn't change the fact that China has deployed one of the most sophisticated SAM's currently in operation on and island that they might not have full legal claim for which can threaten quite a big chunk of the air traffic over the south china sea.