Thanks for replies everyone.
I'm stubborn so I played another time last night. Draw as expected but I did down 3
Chinese planes. I'm beginning to question if the Chinese have too much air assets unless historically it was the case.
I don't think is feasible to hold back my armor because the Chinese armor arrive in turn 2 and just punishes my infantry.
I'm going to try again and see if I can hold the ZSU to fire on closer targets as it seems they target the planes far away.
The Strela is somewhat useful the 14.5mm is useless.