http://www.rusaviainsider.com/russo-chinese-aircraft-mockup-debuts-at-airshow-china/

Some new tidbits on sinorussian widebody airliner. 280 seats (unknown if single class or 2-3 class layout. Probably the latter) for base variant (of total 3 variants). Earlier this year there was also an article saying there’d be 260 to 280 seats.

While we don’t know if model shown is actually based on a true design, we can deduce its somewhere in between b767 and b787 in size, especially fuselage diameter. length wise it seems to be between 767 300 and 767-400.

Article mentions intention of using RR or GE engines and service entry by 2027.