OTL, East Asia was often dominated by China, and during the Song Dynasty they were the closest to starting a medieval industrial revolution before the Mongols came and pillaged them (just an example), obviously Europe then overtook the rest of the world and that led to our world being pretty Eurocentric in some parts.
So if out of a million timelines of Earth diverging from 1000BC, how likely is East Asia going to become the “centre of the world”/dominant like Europe was as opposed to other regions? (Namely Europe)
By East Asia, of course we mean China, Korea and Japan. But for the sake of this discussion I will add Indochina as well.