I am not surprise that China has the most mining as the price of bitcoin explosion in the end of 2013 because of Chinese people.
There are likely more people getting rich in China than in all the rest of the world combined.
Not strictly true, india has started booming recently and is well on the way to become the number 2 superpower but yes both china and india are gaining so much wealth between them they have became the new what was the American dream.
I am not surprised china has that much of the mining under control for the obvious reason a lot is made in china and i suspect that involves mining equipment to?