World in 1412
Let us assume that for whatever reason, ASB, a crazed dream, or some prophecy, the Chinese decide to open up and advance far more quickly than it did in real life. That isn't saying that it didn't advance quickly in real life, but assume that it advanced faster. What would the world look like? Open to discussion, though I'm doing a timeline as well. Timeline and map.
If this is in the wrong place, let me know. Map is from Chinese perspective, taken from one of the fine blank maps here. Lord Sanders, I believe.