That's the OP's point: COMAC is using CFM LEAP 1-C engines on the C919. To be fair, they have taken the effort to build the CJ 1000A engine - which is on wing

That's the OP's point: COMAC is using CFM LEAP 1-C engines on the C919. To be fair, they have taken the effort to build the CJ 1000A engine - which is on wing testing should the tangerine fellow cut them off. But its Plan B at best.