Maintain German ties with Nationalist China, Hitler gets gored to death by a mountain goat post-anschluss.
Germany under Goering/Himmler/Hess/von Brauchitsch/anybody realises that Molotov-Ribbentrop is a losing proposition and decides to change direction, guaranteeing Polish borders along with Britain and France and doing quite a lot of exchange programs with the Czech and Polish military but not funding the OTL military buildup, but maintaining ties with Chiang and not Japan.
Long story short, European war is Poland/Germany/Baltics vs USSR, former's focus is on liberating Ukraine and Belarus without all the OTL Nazi evil. Anglo-French loans keep the war going out of a mix of desires to crush Communism and see Germany bleed respectively. War ends with Soviet collapse west of Urals (no Winter War experience and terribad purged officer corps, plus gleeful celebratory liberating troops strewing flowers and chocolate for small children).
Western liberal democracies fund Eastern Europe buildup but German industry needs more workers and so takes in large Chinese migrant community familiar with German cadre and technology because that's where lots of the post-war surplus goes and as KMT corruption, Japanese nationalist/militarist campaigns, and Maoist anti-intellectualist terror takes its toll an awful lot of educated/middle-class entrepreneurially-ambitious Chinese emigrés move to Nazi Germany.