lol even if J-10 was developed with the help of Israel (highly doubtful since the US enforced an arms embargo on china since 89 by all its allies) so what? we absorbed the technology and produce all its spare parts. the gear box is definitely not russian, there is no credible source that i've seen that says its russian. the russian engine has already been replaced by WS-10. the missiles are chinese.
every step of aircraft deployment, from production to arming, maintainance, and repair, is carried out by chinese technicians in china. furthermore the equipment necessary to do this is also produced by china, and the equipment used to produce the equipment is also produced by china.
india on the other hand shamefully buys aircraft with conflicting parts and non interchangable missiles that it can't even repair independently. we could give you a blueprint of the J-10 and you would not be able to manufacture a nail for it. hell, the russians gave you not only a blueprint but a prototype and several engineers to help you produce Su-27's but it completely failed as india's backwards industrial capability is not even capable of copying someone that allows you to copy them.