Asian colonisation of the Americas?

What if the Chinese explorer Zheng He decided to sail to the east and discovered the Americas around 1430?

Would the same have happened as with the Europeans? Conquest and colonisation or would the Asians have behaved differently?

And if they had done the same as the Europeans - would there have been Chinese/European wars for control of the Americas?

Or would the Chinese by 1492 be allready in control of everything? (established colonies etc)
 
China entered an isolationist phase shortly after the travels of Zheng He so most probably the only difference would have been maps and descriptions of the discovered coastlines in chinese archives. You would have to butterfly away chinese isolationism. Even if the Chinese do not fall back into this sort of isolationism in the course of the 15th century and started colonizing the west coast, they would do it at a comparitively slow pace, because they wouldn't have had a competitor. One of the reasons why the european powers colonized the Americas as fast as they did was because everyone was afraid that someone else would get the bait. So even if China will have colonies on the west coast, it is going to lose them sooner or later to the more aggressive european powers.
 
The geography of North America's west coast does not lend itself to eastward expansion, and has been said any Chinese colonies in California or the Puget Sound will probably be abandoned by the mother country. They might survive, but be quite culturally distinct by the time Europeans find them.
 
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