S-30 is a follow-up extension of S-27, which has been improved into a multi-role fighter.
China imported S-27 and S-30 from Russia in 1990s.
Later, I bought a license to produce S-27 and related technology patents from Russia.
S-27 produced in China is called J 1 1, which is of course quite different from the original.
J 1 1A is S-27SMK.
It is a fighter assembled from S27 parts imported from China. There are only a few domestic parts. (j 10 stopped production when it was in service)
○ 1 1B is a completely domestic product of S-27SMK, including airborne equipment and engines. The performance is far from the Su -27 fighters serving in various countries. The detection range of radar reaches 130 km, and it can detect 20 targets and attack 6 of them at the same time. Domestic air weapons can also be used. It is beyond the reach of the previous SU27 series.
歼 1 1C is a ship-borne weapon, which is still under development and equipped with Chinese aircraft carriers. It is necessary to strengthen the transformation of fuselage structure, landing gear structure, engine power and wing folding.