You dont understand bro what i am trying to say, DSI/LOAN type nozzles is tested because for 5th gen development, at the time they tested LOAN/DSI tech on F-16 (mid to late 90s) production of F-16 was still running for USAF its could be easy to produce new F-16 with LOAN/DSI tech, and DSI not only save weight but simplify intakes properties and have a stealth function without complexities, (hide turbine blades of an engine) one of the main source of increased RCS signature to radars
@FuturePAF
cost main concern is cost but remember bro, its going to have heavier than WS-13E/RD-93MA, which will effect the performance of B3
@FuturePAF
Look at the progress of another Chinese engine WS-10 the basic version of WS-10 is in the same class of AL-31F/F-100/GE-110 engine but they upgrade WS-10 several times to be used in various version of J- series of their jets, WS-10 IPE is being used on J-20/J-10B with TVC with a thrust of 33,000 lbs, If PAF ask to China to upgrade WS-13E to another level like WS-10IPE does, so there is/will no need WS-19 or something like that
@FuturePAF