There's something else which I'd like to add.
Firstly - I believe that those foreign think tanks/agencies-sourced numbers are seriously underestimated.
Secondly - Just like in the Miscellaneous News thread -
@tamsen_ikard's problem is looking at things too simplistically and have a superficial understanding of how things actually work.
Raw number of SAMs, while important, is absolutely very far from being the sole determining factor of the overall effectiveness of China's SAM capabilities.
Beyond all those aforementioned SAMs - Where are all those:
1. Stationary early warning radar and EO/IR sites,
2. Mobile search/fire control radar and EO/IR stations/vehicles,
3. AEW&C and ELINT/ECM aircrafts,
4. AEW and ELINT/EW UAVs,
5. Satellite-based EO/IR sensors (particularly for tracking supersonic and hypersonic targets),
6. AAM-armed manned fighter aircrafts,
7. AAM-armed HALE/MALE/loyal wingman-type UCAVs,
8. Gun-based/DEW-based/Counter-UAV UAV-based CIWS,
9. BACN-type communication node aircrafts/UAVs that are completely lacking from his argument, and
10. Active and passive decoys - Of which he completely choose to neglect/ignore?
All of these work together in integrated-&-distributed networks of air defense systems across multiple domains, which means the overall result and impact would be 1 + 1 >> 2 instead of just 1 + 1 = 2. No unit and no platform will ever work completely on its own unless under exceptional circumstances.
As speaking of "muh SAM TELs": Under the same integrated-&-distributed networks of air defense systems, this beast-mode WL-3 UAV can actually intercept the same number of enemy (cruise) missiles as several SAM TELs combined.
View attachment 149077
So there's that.