The Russians appear the be very advanced in making composite wings and high bypass turbofans. Would it not be best to just remove the foreign components that will be remaining? Give these small projects to Iran, Kazakhstan or Pakistan. Then have China colonize the flight controls and avionics.
western components help with certification process in western countries; if they sanction Chinese planes they'll also be sanctioning their own companies and whose to say China won't already have the machining and tooling for those components?
Before the official launch of the programme, there was a camp in Comac that wanted to go it alone.
