The J-20 being sold to India?? Are you talking about the same India which is targeted by scores of ballistic missiles and fighters in Tibet and Xinjiang?? Pakistan maybe.
The Chicoms have at least two different AEW/C systems which are ready for operation, if not already in service. One is already due to be delivered to Pakistan.
LOL, I meant Pakistan. India and China are swapping a lot of laughs these days.