You mean inarch with yangmei or native rootstock? I once approach grafted a native rootstock and the rootstock gave up its roots, thinking it can just take nutrients from the mother tree. It grew pretty well until I cut below the yangmei side of the graft.
I did cleft, whip and tongue, approach, side. I guess side graft is more successful for me. It's still not a good percentage though.
I keep saying it's hard to propagate, but that could be just me, or my rootstocks, or my one mother plant.