You should know only J-11B actualy carry PL-12. And it is as high-tech as your Su-27SM. Since Su-27SM is still classified, why do you think PRC is gona give you it's manual.
Beside, the origenal J-11 is just a Chinese made Su-27. No upgrade were made on that. Only last year they changed it's engine. Why can't we just module this one. And they don't even have to module the new engine.
They can just simplely add new country in and add one more skin.