here are data of inventories from the WDMMA, it is odd that there is no future orders for the China air forces? China will be close to Russia's in numbers if adding future's.
USA
Attack: 1,956 units
Support: 1,692 units
Training: 1,541 units
Future: 2,419 units
Russia
Attack: 1,230 units
Support: 1,932 units
Training: 487 units
Future: 729 unit
India
Attack: 632 units
Support: 709 units
Training: 304 units
Future: 689 units
China
Attack: 1,335 units
Support: 370 units
Training: 261 units
Future: 0 units