The assembly of the MC-21-300 fuselage was completed at the Irkutsk Aviation Plant, a branch of Irkut Corporation (part of UAC). This aircraft will be tested with the Russian PD-14 engine.
The semi-bodies of the prototype were docked at the automated station. Installation of systems, joining of wing consoles and tail fins of the MC-21-300 aircraft will begin soon.
Video of the MC-21-300 fuselage docking: https://youtu.be/gQshyncjFTM.