I see, so if we filled up the gap between numbers, like 30071, 30172, 30173, 30174 for the PLAAF, we could loosely estimate the total number would be somewhere around 25?Not 100% for sure since not all numbers are known, but within the 26th Division the highest number I know is 30175 and as such no. 15 (even if there is also a no. 21 know, but I think this was for the old numbering system)
For the PLAN it's a bit more difficult, since for the 9th NAD only 2 are know, (maybe reassigned to other units?), for the 3rd NAD I know up to six and the 1st NAD three are known but since mid-2019 some started to carry a new 2-digit serial numbers.
Confirmed only by numbers are 11 within the PLAAF and 9 within the PLAN-
Considering how much land mass China makes up (especially the length of our coast line) as well as the area of the South China Sea the PLA needs to cover - most certainly.50 AWACS/AEW? do they really need that many?