Just because they happen to reside in the same arbitrary borders, doesn't mean they're some sort of hive-mind colluding to take over.  Stop jumping at shadows.  Also slightly disgusted with the double standard that no one cared when it was any other country with the largest hash rate (since there's obviously always going to be one with a higher hash rate than the others), but now just because it's China we should sound the alarm?  Are you trying to come across as racists or something?