@jbuckbuddy China at War allows USSR to invade Sinkang in July of 37 but OOB must be July of 1939 but I warn you about doing this because this will cause the Warlords to align to KMT (or whatever the rule book depending on expansions state) and put you at war with KMT which means USSR lost it’s neutrality to the Allies and might cause the Allies to declare war on you.