They will not attract Western Airlines, however for Non Western market, well don't be that sure. It will take time for them to build MRO value chains, but it is doable. If the prices and cost of maintenance right, it can happen as time progressing.
Airliners manufacturing is long haul game. The African market for example, is small right now. However all Airlines analyst agree it will be increase exponantialy in foreseable future. This the region that both China and Russia have enough influences, and where many looking for Western alternatives.
Getting China market is practically taking close 20% of Global Airlines growth. Plus Russia and other smaller Non Western market, they practically can get 20-25% of Global market. That's enough to make them as real alternative for Airbus and Boeing.
Reputation need time to build, however looking on how the Chinese work right now, don't discount them.
How long they will take ? Even the best snenario will take one decades and realistically two decades. This is with massive Investment and the wilingness to rebuild Nuclear plant. It is been discussed much on alternative energy thread in this forum.
In the mean time, West still need Hydrocarbon. Can Euro Zone especially replace Russian Hydrocarbon? Trade War work both ways.
Add:
Discover air safety incidents, accidents and plane crashes for the aircraft type Ilyushin Il-96. Learn more about the safety record for Ilyushin Il-96
www.aeroinside.com
Put example on IL-96 incidents record. Even though the fleet are small, however compared to it's contemporary rival A340, percentage wise it is not Bad.
I put IL-96 as example because it is practically all Russian Tech and already flying for long period. More importantly no fatal accident so far. Cubana already using them for 12 hrs cross Atlantic routes for long time. No problem on that.
Don't discount Russian and Chinese JV in future can not build proven aircraft. For one thing Russian already build proven Airliners.
Problem with IL-96 is just what faces A340. Long Haul flight with four enggine, is eclipsed by Twin engine. However this Trade War already make China and Russia speed up on the need to get their own alternatives. Some of Non Western market also want that.