They are slated to deliver in late 2021. And you and I both know their competitive edge is not coming from being good, its coming from being Chinese. China is a pretty big market and they will definitely favor Comac.
Because China wants to be able to manufacture everything so that they are beholden to no one. Seize the means of production as it were.
Most of China's innovations in aircraft stem from the fact that they lack the advanced metallurgy and engine manufacturing chops to make powerful engines. Their equivalent to the Blackhawk helicopter uses an advanced fly-by-wire system instead of heavy hydraulics systems because they can't produce an engine powerful enough to meet operational requirements and have hydraulic controls.
I will reserve my comments about IP theft.