Actually more like the ROC managed to defeat the Japanese limiting them to the Pacific, but it was just a little quirk to get me to have a big ass China once again.Obviously Japan didn't get involved in China for some reason and, just as it started out in OTL, China has stayed a German ally and reversed most of the unequal treaties as part of Barbarossa.
I presume Britain was just bombed into submission, with no civilian bombings to distract from the destruction of the RAF, and we didn't have someone as strong as Churchill as PM?
Atomic bombing of London in the late 50's which marks beginning of the long and hard German suppression of the British peoples and the ending to WWIII.