China manufactures a number of aircraft that use Russian-made jet engines. For instance, JF-17 uses a Russian RD-93 engine, etc. Similarly, Russian sells AL-31 jet engines for Chinese J-10C jets. These two aircraft have become a strong competitor to Russian Mig-35 aircraft. Similarly, Chinese Y-20 military cargo aircraft uses Russian Soloviev engines. This aircraft has become a strong competitor to Russian-made IL-76.
Why does Russia sell jet engines to China?