Brutal closing words:
https://www.youtube.com/watch?v=4-arVbTrwUw
"The experts who tell us about all the challenges that face COMAC going up against Airbus and especially Boeing, have everything wrong.
In order to make sales and take market share, all COMAC has to be is minimally competent. As long as they aren't horrible at their job, they will sell planes as fast as they can build them."
(COMAC is the chinese airliner manufacturer)