Satellite imagery from 5 October shows 4 KJ-3000 radar jets.

Mitchell Institute fellow J. Michael Dahm says four aircraft means the type has entered serial production.

It would expand China’s airborne surveillance and battle-management capabilities, built on the Y-20B transport with Chinese-made engines.

Analyst Andreas Rupprecht says the imagery could show low-rate production, or four prototypes parked together.

How each outlet framed it
The War Zone
weighs Dahm's serial-production reading against Rupprecht's caution that all four could be prototypes parked at one site

Sources: The War Zone