might have a serious impact on weather or not the japanese attack perl harbor or not.. delaying american entrance into the war
but the question remains if the russians are not selling military hardware to them .. wouldnt someone else pick up the slack forcing a bit of an idiological swing for the red chinese? if there is a market for weopons to be sold.. someone is usually willing to supply them.. for the last 50 years it has been either america or the russians.. but i would be willing to wager someone would fill in.
You could also wind up with a two chinese state
Maybe the Nazi's support them during the mid to late 30's? causing the chinese to turn more nationalist or facist.. and then the Japanese and and germans never form an alliance.. but the germans and chinese complete an axis.. would make for a possible different barbarosa.. depends on when and where things happen i guess