Just some thoughts :
To me word FC means combined fighter development.
FC1 ( PAC??+CAC??) ( 1 RD 93MA??)
FC 31 ( PAC??+SAC??) ( 2 RD 93MA??)
We went for FC1( light weight, our ??requirement)
Chinese ??went for J10 ( medium weight, their requirement)
Now if we make a double engine J10 stealthy fighter it is J20. ( same engines) but heavy weight category.
Make a FC1 double engine it will become FC 31 ( same engine) but medium weight category.
Now there are talks of 400 RD 93 MA engines. ( 200 FC-31 fighters).
As for I remember once ma'am messiach said, if Russians ?? agree to engine development, Azm is on track.
As we all know there are 3 prototypes of FC-31.
V1= tech demonstrator
V2= Air force version/ PAF?
V3= Double engine, stealthy naval version.
Chinese did not buy FC1 so the designation remained as it is i.e FC1.
Chinese buying FC 31, designation is changing to J31 / J35?
Logically it makes sense because it will decrease the financial burden between two forces. ( is there any other country involved in project? We don't know that but chances are less likely).
Will Chinese be using same engines ( RD 93 MA)? If no, we will most likely go for 100 FC-31 (200 engines), other 200 engines will be used in different blocks of FC1.
If yes, then there is split between two forces.
Now the indigenous part:
Most likely there will be Co-production as in FC1 case. ( percentage basis) or perhaps we get the whole production line?
AESA radar
BVRAAM
WVRAAM
HMD/S?
May be some other systems ( I don't have the required knowledge).
In medicine many a times more knowledgeable physicians go for difficult diagnosis, leaving a simple diagnosis in front of them.
@Mastankhan ( sir if u have time to write without dashes, I can't comprehend them).
@Khafee ( sir if u can share something in this regard if non confidential).
@TomCat @Pakhtoon yum @Gripen9
Some silly ? thoughts, you people can ignore it as well cz I don't have technical knowledge about it.