I do not blame you, any rookie will see despair over the Chinese growing military worth, and you will be right.
Except, mountains are guerilla warfare territory for air combat. A tropical rainforest is to troops what mountains are for the air force. Now, why is that?
- Mountains are ideal hiding/radar-evading terrain. Long-range radars become useless and open up territory for ambushes and hit-run tactics.
- BVRs and missile range become a non-factor. The majority of warfare will be close-combat dogfights.
- MANPADs atop mountains open up a plethora of possibilities and tactics.
Now, to your question.
- How many refuellers do they have? How many can they allocate towards Tibet leaving other vulnerable areas (SCS, Taiwan) ?
- Huge nos. of aircraft but not enough airbases to launch them, not enough HAS, and weak, stretched supply lines.
- Auxiliary aircraft, true, few AWACS more. Nothing spectacular or game-changing like the NATO fleet.
- Neither of us can effectively maintain air dominance in the long-run. And for the record, till now they have been overwhelmed by IAF.
The Foolishness of GoI to rely completely on HAL/ADA for its near & long-term future of air power is a different topic, and I am completely in resonance with you on this fact. We are debating present here.
We can churn out 24+ per year or more if required. We always act proactively. 24+ per year is a very reasonable target with 2 production lines. War-time productivity of any country is ~3x of peacetime, and for rising economies like India & China, it can reach 4x.
We don't have to match the gap. We just need to defend the LAC.