There is no complaint about engine from Russian, the only complaint is you. Chinese project design has assurance from Putin that supplier of engine for both JF-17 and J-10 is not a problem. Pakistan, China, Russia r/s are all time good. Therefore no foresee it will turn sour in next 5-10 years time.Exactly my point ... it is still the most troublesome point of JF-17 manufacturing since there is a need for Russia. Neither China or Pakistan wants that ...