China is a populated country and there is no real wilderness near a 10m population city. Do you know there are 700 persons/sqkm living in Shenyang city? Not the density in the downtown but that of the vast 12980 sqkm administrational area.
Don't think it's a place like the corn belt in the US where there people have to walk one mile or more to visit their neighbors.
Once again, dont comment on things you dont know. I assure you there is just about zero way one can get eyes on the SAC airstrip or the factory from outside its walls, which is NOT the case with CAC.
... which will make it just that tiny bit harder for non-affiliated personnel to know when which aircraft are going on the runway preparing to takeoff, and subsequently harder to get sightings, especially if SAC actually WANTS to keep a secret with test flights, wouldn't you agree?
p.s. ahh now that I had caught up on the more recent posts, allow me to apologize for beating the dead horse