Allright! you are in a delusion thinking that Russia will pass on sensitive ToT to you.
And how will you explain these allegations from your so called "fast friend" Russia?
1) Rostec's chief of intellectual property told that, "China alone has copied aircraft engines, Sukhoi planes, deck jets, air defense systems, portable air defense missiles, and analogs of the Pantsir medium-range surface-to-air systems."
2) China has long copied Russian weaponry. During the 1990s, China purchased Russia's elite Su-27 fighter jets and S-300 missile systems. Beijing later used these as templates for developing its own J-11 fighter jet and HQ-9 surface-to-air missiles.
Russia also still refrains from transferring its most sensitive technologies to China. For example, Moscow has thus far declined to transfer Russian
RD-180 rocket engines. Likewise, there are strong indications that it would withhold sale of the
Iskander missile despite Chinese interest.
Russia is just hobnobbing with China just after the Ukraine crisis triggered by US and NATO. If US lifts all the sanctions and pressure than it has no use for the
'Technology Thief' China. After all Russians are more Europeans in any aspects.