Your geographical knowledge is poor after i read the first sentence..
See, Without having any agreement from french regarding making modification to the original deign or making similar clones is a illegal copy, Unlike Hummer in china their is all illegal copies, I can be wrong provided you provide some proof about its home made deign..
J-20 deign is very much close to MIG-1.44 deign, that is no coincident..
95% deigns are foreign including space rocket to modules that why their is so less time to develop and test, Same goes for Aircraft, Trains, so does tanks and What will be self created deign which its future will relay on as basic platform ?, Russian have well Establishment Space research facilities and knowledge from beginning and funding are only increasing, I see no way Russia is getting behind, but increasing rapidly, China is now only started its adventure and it is nice, But not uncommon and anything new for other who already started long time back..