The C919 will eventually be certified in the rest of the world. It’s just a matter of time. Maybe a long time but it will occur. And China will use it as a learning curve for the C929. They have to start somewhere and the ARJ-21 was their 21st Century starting point. Learning to build and certify airliners doesn’t happen overnight. But when China is wants to do something; they do it. Might take a long time but they’ll get there.