Have him stay true to his Mandarin family history, rather than embrace Communism. From my limited understanding if Zhou En Lai converts to the GMD than you will probably get Zhu De as well.
They studied together at a German university from memory, so if we use that as a POD for the switch let them see first hand the negative impact from the Spartakus uprising or tour Poland and see why the Polish Army defeated the Red Army on the Vistula.