China's first emperor was installed after an invasion from the west using previously unseen in china weapons of horses and chariots. It's beyond doubt that whites were involved. The only debate is whether they were mercenaries or not. If the new weapons were such an edge, and horses are quite the edge, the mercenaries will always just take the rulership for themselves. Or more likely aryans conquered western china, became intermixed, and this new intermixed group then conquered all of china to create the nation. And they still probably had white mercenaries.